|  
 (dfp)2CH+
 | 0 | E Parameter: 8.02 
 |  | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 (tfm)2CH+
 | 0 | E Parameter: 7.96 
 |   | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 (dfp)(mfp)CH+
 | 0 | E Parameter: 7.52 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 (mfp)2CH+
 | 0 | E Parameter: 6.87 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 (dfp)PhCH+
 | 0 | E Parameter: 6.74 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 (tfm)PhCH+
 | 0 | E Parameter: 6.70 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 (mfp)PhCH+
 | 0 | E Parameter: 6.23 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 1,3-bis(2,4,6-trimethylphenyl)but-1-ylium ion
 | 0 | E Parameter: 6.16 
 |  | Macromolecules 2005, 38, 33-40 DOI: 10.1021/ma048389o
 | 
|  
 diarylallylium ion (3,3-F2)2
 |  | E Parameter: 6.11 
 |    | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 (2,4,6-trimethylphenyl)ethylium ion
 | 0 | E Parameter: 6.04 
 |  | Macromolecules 2005, 38, 33-40 DOI: 10.1021/ma048389o
 | 
|  
 cumyl cation
 |  | E Parameter: 5.74 
 |    | Macromolecules 2010, 43, 1719-1723 DOI: 10.1021/ma9024569
 | 
|  
 (pcp)2CH+
 | 0 | E Parameter: 5.48 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 benzhydrylium ion Ph2CH+
 | 0 | E Parameter: 5.47 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 (Ftol)2CH+
 | 0 | E Parameter: 5.24 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 pfp(Ph)CH+
 | 0 | E Parameter: 5.20 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 (pfp)2CH+
 | 0 | E Parameter: 5.01 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 tol(Ph)CH+
 | 0 | E Parameter: 4.43 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 diarylallylium ion (3-F)2
 |  | E Parameter: 4.15 
 |   | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 (tol)2CH+
 | 0 | E Parameter: 3.63 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 1-(4-chlorophenyl)cyclopent-2-enylium ion
 | 0 | E Parameter: 3.20 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 methoxy-phenylmethylium ion
 | 0 | E Parameter: 2.97 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 pop(Ph)CH+
 | 0 | E Parameter: 2.90 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 1-phenylcyclopent-2-enylium ion
 | 0 | E Parameter: 2.89 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 diarylallylium ion (4-Br)2
 |  | E Parameter: 2.85 
 |    | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 diphenylallylium ion
 |  | E Parameter: 2.70 
 |    | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 diarylallylium ion (4-Cl)2
 |  | E Parameter: 2.69 
 |  | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 (3-F)4-tritylium ion
 |  | E Parameter: 2.54 
 |  | Eur. J. Org. Chem. 2011, , 6470-6475 DOI: 10.1002/ejoc.201100910
 | 
|  
 N-ethylidenecarbazolium ion
 | 0 | E Parameter: 2.41 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 9-phenyl-9H-fluoren-9-ylium
 | dichloromethane | E Parameter: 2.41 
 |    | Chem. Eur. J. 2017, 23, 623-630 DOI: 10.1002/chem.201603963
 | 
|  
 (4-CF3)2-tritylium ion
 |  | E Parameter: 2.28 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 pop(tol)CH+
 | 0 | E Parameter: 2.16 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 ani(Ph)CH+
 | 0 | E Parameter: 2.11 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 (3-F)3-tritylium ion
 |  | E Parameter: 2.07 
 |  | Eur. J. Org. Chem. 2011, , 6470-6475 DOI: 10.1002/ejoc.201100910
 | 
|  
 (3-Cl)3-tritylium ion
 |  | E Parameter: 1.99 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 methoxy-(4-methylphenyl)methylium ion
 | 0 | E Parameter: 1.90 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (3-F)2-tritylium ion
 |  | E Parameter: 1.54 
 |  | Eur. J. Org. Chem. 2011, , 6470-6475 DOI: 10.1002/ejoc.201100910
 | 
|  
 ani(tol)CH+
 | 0 | E Parameter: 1.48 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 4-chlorobenzaldehyde-boron trichloride complex
 |  | E Parameter: 1.44 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (4-CF3)-tritylium ion
 |  | E Parameter: 1.33 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 di-p-tolyl-allylium ion
 |  | E Parameter: 1.23 
 |    | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 (3-CF3)-tritylium ion
 |  | E Parameter: 1.18 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 benzaldehyde-boron trichloride complex
 |  | E Parameter: 1.12 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 1,3-diphenylpropyn-1-ylium-Cr(CO)3
 |  | E Parameter: 1.07 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (3-Cl)-tritylium ion
 |  | E Parameter: 1.06 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 (3-F)-tritylium ion
 |  | E Parameter: 1.01 
 |  | Eur. J. Org. Chem. 2011, , 6470-6475 DOI: 10.1002/ejoc.201100910
 | 
|  
 1,1,3-triphenylallylium ion
 | 0 | E Parameter: 0.98 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 9-(4-methoxyphenyl)-9H-fluoren-9-ylium
 | dichloromethane | E Parameter: 0.85 
 |    | Chem. Eur. J. 2017, 23, 623-630 DOI: 10.1002/chem.201603963
 | 
|  
 ani(pop)CH+
 | 0 | E Parameter: 0.61 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 tritylium ion (Ph3C+)
 | 0 | E Parameter: 0.51 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 (4-F)-tritylium ion
 |  | E Parameter: 0.35 
 |  | Eur. J. Org. Chem. 2011, , 6470-6475 DOI: 10.1002/ejoc.201100910
 | 
|  
 (4-F)2-tritylium ion
 |  | E Parameter: 0.17 
 |  | Eur. J. Org. Chem. 2011, , 6470-6475 DOI: 10.1002/ejoc.201100910
 | 
|  
 methoxy-(4-methoxyphenyl)methylium ion
 | 0 | E Parameter: 0.14 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (4-F)3-tritylium ion
 |  | E Parameter: 0.05 
 |  | Eur. J. Org. Chem. 2011, , 6470-6475 DOI: 10.1002/ejoc.201100910
 | 
|  
 (ani)2CH+
 | 0 | E Parameter: 0.00 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 (4-Me)-tritylium ion
 |  | E Parameter: -0.13 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 1,1,3-triphenylpropyn-1-ylium-Cr(CO)3
 |  | E Parameter: -0.25 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 dibenzo[a,d]tropylium ion
 | dichloromethane | E Parameter: -0.63 
 |  | Liebigs Ann. 1995, , 2005-2009 DOI: 10.1002/jlac.1995199511281
 | 
|  
 (4-Me)2-tritylium ion
 |  | E Parameter: -0.70 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 (fur)(ani)CH+
 | 0 | E Parameter: -0.81 
 |      | J. Am. Chem. Soc. 2012, 134, 13902-13911 DOI: 10.1021/ja306522b
 | 
|  
 propyn-1-ylium-Co2(CO)6
 |  | E Parameter: -0.84 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 1-phenyl-proyn-ylium-Co2(CO)6
 |  | E Parameter: -0.97 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (4-Me)3-tritylium ion
 |  | E Parameter: -1.21 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 (fur)2CH+
 | 0 | E Parameter: -1.36 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 di-p-anisyl-allylium ion
 |  | E Parameter: -1.45 
 |    | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 3-phenylpropyn-1-ylium-Co2(CO)6
 |  | E Parameter: -1.58 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (4-MeO)-tritylium ion
 |  | E Parameter: -1.59 
 |  | Eur. J. Org. Chem. 2011, , 6470-6475 DOI: 10.1002/ejoc.201100910
 | 
|  
 3-(trimethylsilyl)propyn-1-ylium-Co2(CO)6
 |  | E Parameter: -1.60 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (4-MeO,3-OMe)-tritylium ion
 |  | E Parameter: -1.62 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 3-benzylidene-1-methyl-3H-indol-1-ium ion
 | 0 | E Parameter: -1.80 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 (4-OMe,3-Me)-tritylium ion
 |  | E Parameter: -1.84 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 Ph2C=C=N(+)Me2
 | 0 | E Parameter: -1.90 
 |  | Synthesis 2025, , eFirst DOI: 10.1055/a-2649-1999
 | 
|  
 (4-MeO,4-Me)-tritylium ion
 |  | E Parameter: -2.13 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 1,3-dithianylium ion
 | 0 | E Parameter: -2.14 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 1-methyl-3-(4-methylbenzylidene)-3H-indol-1-ium ion
 | 0 | E Parameter: -2.19 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 fc(Me)CH+
 | 0 | E Parameter: -2.57 
 |  | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 fc(Ph)CH+
 | 0 | E Parameter: -2.64 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 1,1-dianisyl-3-phenylallylium ion
 | 0 | E Parameter: -2.67 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 Me2C=C=N(+)Me2
 | 0 | E Parameter: -2.80 
 |  | Synthesis 2025, , eFirst DOI: 10.1055/a-2649-1999
 | 
|  
 fc(ani)CH+
 | 0 | E Parameter: -2.90 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 3-(4-methoxybenzylidene)-1-methyl-3H-indol-1-ium iom
 | 0 | E Parameter: -3.02 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 (4-MeO)2-tritylium ion
 |  | E Parameter: -3.04 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 (pfa)2CH+
 | 0 | E Parameter: -3.14 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 flavylium ion
 | 0 | E Parameter: -3.45 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 C7H7+-Fe(CO)3
 |  | E Parameter: -3.49 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ)
 | MeCN | E Parameter: -3.66 
 |    | J. Am. Chem. Soc. 2013, 135, 12377-12387 DOI: 10.1021/ja405890d
 | 
|  
 tropylium ion
 | 0 | E Parameter: -3.72 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (mfa)2CH+
 | 0 | E Parameter: -3.85 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 (4-MeO)3-tritylium ion
 |  | E Parameter: -4.35 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 9-(4-(dimethylamino)phenyl)-9H-fluoren-9-ylium
 | dichloromethane | E Parameter: -4.51 
 |    | Chem. Eur. J. 2017, 23, 623-630 DOI: 10.1002/chem.201603963
 | 
|  
 4,6-dinitrotetrazolopyridine
 | 0 | E Parameter: -4.67 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 (dpa)2CH+
 | 0 | E Parameter: -4.72 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 4-nitro-6-(trifluoromethylsulfonyl)benzofuroxan
 | 0 | E Parameter: -4.91 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 2-(4-methoxyphenyl)chromenylium ion
 | 0 | E Parameter: -4.95 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (E)-3-benzylidene-1,2-dimethyl-3H-indol-1-ium ion
 | 0 | E Parameter: -4.96 
 |   | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 (E)-1,2-dimethyl-3-(4-methylbenzylidene)-3H-indol-1-ium ion
 | 0 | E Parameter: -5.05 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 4,6-dinitrobenzofuroxan
 | 0 | E Parameter: -5.06 
 |    | J. Org. Chem. 2006, 71, 9088-9095 DOI: 10.1021/jo0614339
 | 
|  
 (E)-2-(tert-butyl)-3-(4-methylbenzylidene)-3H-indol-1-ium
 | dichloromethane | E Parameter: -5.06 
 |  | Eur. J. Org. Chem. 2016, , 4050-4058 DOI: 10.1002/ejoc.201600572
 | 
|  
 (E)-2-methyl-3-(4-methylbenzylidene)-3H-indol-1-ium ion
 | 0 | E Parameter: -5.15 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 methyl(phenyl)methyleneammonium ion
 | 0 | E Parameter: -5.17 
 |  | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 Selectfluor
 | 0 | E Parameter: -5.20 
 |    | J. Am. Chem. Soc. 2018, 140, 11474-11486 DOI: 10.1021/jacs.8b07147
 | 
|  
 N-fluoro-2,6-dichloropyridinium tetrafluoroborate
 | 0 | E Parameter: -5.29 
 |    | J. Am. Chem. Soc. 2018, 140, 11474-11486 DOI: 10.1021/jacs.8b07147
 | 
|  
 4,6-dinitrobenzofurazan
 | 0 | E Parameter: -5.46 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 MacMillan-iminium ion (2nd generation)
 | MeCN | E Parameter: -5.52 
 |    | Angew. Chem. Int. Ed. 2011, 50, 9953-9956 DOI: 10.1002/anie.201103683
 | 
|  
 (mor)2CH+
 | 0 | E Parameter: -5.53 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 Vilsmeier ion
 | 0 | E Parameter: -5.77 
 |  | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 4-aza-6-nitrobenzofuroxan
 | 0 | E Parameter: -5.86 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 (mpa)2CH+
 | 0 | E Parameter: -5.89 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 (S,E)-5-benzyl-2,2,3-trimethyl-1-((E)-3-(4-nitrophenyl)allylidene)-4-oxoimidazolidin-1-ium
 | dichloromethane | E Parameter: -5.90 
 |   | Asian J. Org. Chem. 2014, 3, 550-555 DOI: 10.1002/ajoc.201402009
 | 
|  
 (2S,5S)-5-benzyl-3-methyl-4-oxo-1-(3-phenylallylidene)-2-((E)-styryl)imidazolidin-1-ium
 | dichloromethane | E Parameter: -5.90 
 |   | Asian J. Org. Chem. 2014, 3, 550-555 DOI: 10.1002/ajoc.201402009
 | 
|  
 2-phenyl-1,3-dithiolan-2-ylium ion
 | 0 | E Parameter: -5.91 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 bis(1-methylindol-3-yl)methylium ion
 | 0 | E Parameter: -5.99 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 (S,E)-2,2,3-trimethyl-4-oxo-5-((perfluorophenyl)methyl)-1-((E)-3-phenylallylidene)imidazolidin-1-ium
 | dichloromethane | E Parameter: -6.00 
 |   | Angew. Chem. Int. Ed. 2013, 52, 7967-7971 DOI: 10.1002/anie.201301864
 | 
|  
 (S,E)-5-benzyl-1-((E)-3-(4-cyanophenyl)allylidene)-2,2,3-trimethyl-4-oxoimidazolidin-1-ium
 | dichloromethane | E Parameter: -6.00 
 |   | Asian J. Org. Chem. 2014, 3, 550-555 DOI: 10.1002/ajoc.201402009
 | 
|  
 N-(phenylsulfonyl)-N-((trifluoromethyl)thio)benzenesulfonamide
 | 0 | E Parameter: -6.06 
 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 (S,E)-5-benzyl-2,2,3-trimethyl-1-((E)-3-(3-nitrophenyl)allylidene)-4-oxoimidazolidin-1-ium
 | dichloromethane | E Parameter: -6.10 
 |   | Asian J. Org. Chem. 2014, 3, 550-555 DOI: 10.1002/ajoc.201402009
 | 
|  
 4-nitrobenzodifuroxan (NBDF)
 | 0 | E Parameter: -6.15 
 |    | Chem. Eur. J. 2007, 13, 8317-8324 DOI: 10.1002/chem.200700676
 | 
|  
 1-phenyl-propyn-1-ylium-Co2(CO)5(PPh3)
 |  | E Parameter: -6.19 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 3-(4-(dimethylamino)benzylidene)-1-methyl-3H-indol-1-ium ion
 | 0 | E Parameter: -6.26 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 4-cyano-6-nitro-benzofuroxane
 | 0 | E Parameter: -6.41 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 2-phenyl-1,3-dithianylium ion
 | 0 | E Parameter: -6.43 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 N-(trifluoromethyl)thio)saccharin
 | 0 | E Parameter: -6.48 
 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 dimethylmethyleneammonium ion
 | 0 | E Parameter: -6.69 
 |  | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 2,3,4,5,6,6-hexachlorocyclohexa-2,4-dien-1-one
 | MeCN | E Parameter: -6.75 
 |    | Org. Lett. 2010, 12, 2238-2241 DOI: 10.1021/ol100592j
 | 
|  
 bis(5-methoxy-1-methylindol-3-yl)methylium ion
 | 0 | E Parameter: -6.90 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 (S,E)-2,2,3-trimethyl-4-oxo-1-((E)-3-phenylallylidene)-5-(3,4,5-trimethoxybenzyl)imidazolidin-1-ium
 | dichloromethane | E Parameter: -7.00 
 |   | Angew. Chem. Int. Ed. 2013, 52, 7967-7971 DOI: 10.1002/anie.201301864
 | 
|  
 6-cyano-4-nitrobenzofuroxan
 | 0 | E Parameter: -7.01 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 (dma)2CH+
 | 0 | E Parameter: -7.02 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 N-methylacridinium ion
 | 0 | E Parameter: -7.15 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 (S,E)-5-benzyl-2,2,3-trimethyl-4-oxo-1-((E)-3-(p-tolyl)allylidene)imidazolidin-1-ium
 | dichloromethane | E Parameter: -7.20 
 |   | Asian J. Org. Chem. 2014, 3, 550-555 DOI: 10.1002/ajoc.201402009
 | 
|  
 (S,E)-5-((1H-indol-3-yl)methyl)-2,2,3-trimethyl-4-oxo-1-((E)-3-phenylallylidene)imidazolidin-1-ium
 | dichloromethane | E Parameter: -7.30 
 |   | Asian J. Org. Chem. 2014, 3, 550-555 DOI: 10.1002/ajoc.201402009
 | 
|  
 MacMillan-iminium ion (1st generation)
 | MeCN | E Parameter: -7.37 
 |    | Angew. Chem. Int. Ed. 2011, 50, 9953-9956 DOI: 10.1002/anie.201103683
 | 
|  
 diarylallylium ion (4-NMe2)2
 |  | E Parameter: -7.50 
 |    | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 (ethene-1,1-diyldisulfonyl)dibenzene
 | DMSO | E Parameter: -7.50 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 | 
|  
 MacMillan-iminium ion (spiro)
 | MeCN | E Parameter: -7.67 
 |    | Angew. Chem. Int. Ed. 2011, 50, 9953-9956 DOI: 10.1002/anie.201103683
 | 
|  
 (pyr)2CH+
 | 0 | E Parameter: -7.69 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 p-tosyl isocyanate
 | MeCN | E Parameter: -7.69 
 |    | J. Am. Chem. Soc. 2020, 142, 8383-8402 DOI: 10.1021/jacs.0c01960
 | 
|  
 C6H7+-Fe(CO)3
 |  | E Parameter: -7.76 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 1-methyl-3-((julolidin-9-yl)methylene)-3H-indol-1-ium ion
 | 0 | E Parameter: -7.79 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 (4-NMe2)-tritylium ion
 |  | E Parameter: -7.93 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 (S,E)-5-benzyl-1-((E)-3-(4-methoxyphenyl)allylidene)-2,2,3-trimethyl-4-oxoimidazolidin-1-ium
 | dichloromethane | E Parameter: -8.00 
 |   | Asian J. Org. Chem. 2014, 3, 550-555 DOI: 10.1002/ajoc.201402009
 | 
|  
 Jorgensen/Hayashi-iminium ion
 | 0 | E Parameter: -8.20 
 |    | Angew. Chem. Int. Ed. 2008, 47, 8723-8726 DOI: 10.1002/anie.200802889
 | 
|  
 (thq)2CH+
 | 0 | E Parameter: -8.22 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 p-CF3-C6H4-CH=N+Me2 (in MeCN)
 | MeCN | E Parameter: -8.34 
 |    | J. Am. Chem. Soc. 2013, 135, 6579-6587 DOI: 10.1021/ja401106x
 | 
|  
 5-methoxyfuroxano[3,4-d]pyrimidine
 | 0 | E Parameter: -8.37 
 |    | J. Phys. Org. Chem. 2003, 16, 431-437 DOI: 10.1002/poc.606
 | 
|  
 NFSI
 | MeCN | E Parameter: -8.44 
 |    | J. Am. Chem. Soc. 2018, 140, 11474-11486 DOI: 10.1021/jacs.8b07147
 | 
|  
 (PhCH2)2N+=CH-CH-Ph
 | 0 | E Parameter: -8.50 
 |    | Angew. Chem. Int. Ed. 2008, 47, 8723-8726 DOI: 10.1002/anie.200802889
 | 
|  
 fc2CH+
 | 0 | E Parameter: -8.54 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 mor iminium
 | 0 | E Parameter: -8.60 
 |    | Angew. Chem. Int. Ed. 2008, 47, 8723-8726 DOI: 10.1002/anie.200802889
 | 
|  
 ani(Br)2QM
 | 0 | E Parameter: -8.63 
 |     | Angew. Chem. Int. Ed. 2002, 41, 91-95 DOI: 10.1002/1521-3773(20020104)41:1<91::AID-ANIE91>3.0.CO;2-P
 | 
|  
 (ind)2CH+
 | 0 | E Parameter: -8.76 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 o-chloranil (C=O)
 | 0 | E Parameter: -8.77 
 |    | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 dibenzyl azodicarboxylate
 | MeCN | E Parameter: -8.89 
 |    | Chem. Eur. J. 2010, 16, 11670-11677 DOI: 10.1002/chem.201001598
 | 
|  
 C6H6OMe+-Fe(CO)3
 |  | E Parameter: -8.94 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 1,1-bis(4-dimethylaminophenyl)-3-phenylallylium ion
 | 0 | E Parameter: -8.97 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 6-nitro-tetrazolo[1,5a]pyridine
 | 0 | E Parameter: -9.05 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 benzylidene-Meldrum's acid
 | 0 | E Parameter: -9.15 
 |    | J. Org. Chem. 2008, 73, 2738-2745 DOI: 10.1021/jo702590s
 | 
|  
 Me2N+=CH-CH-Ph
 | 0 | E Parameter: -9.20 
 |    | Angew. Chem. Int. Ed. 2008, 47, 8723-8726 DOI: 10.1002/anie.200802889
 | 
|  
 C7H9+-Fe(CO)3
 |  | E Parameter: -9.21 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 PhCH=N+Me2 (in MeCN)
 | MeCN | E Parameter: -9.27 
 |    | J. Am. Chem. Soc. 2013, 135, 6579-6587 DOI: 10.1021/ja401106x
 | 
|  
 PhCH=N+(CH2)4 (in MeCN)
 | MeCN | E Parameter: -9.35 
 |    | J. Am. Chem. Soc. 2013, 135, 6579-6587 DOI: 10.1021/ja401106x
 | 
|  
 p-fluoranil (C=O)
 | 0 | E Parameter: -9.37 
 |    | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 benzylidenemalononitrile
 | 0 | E Parameter: -9.42 
 |    | J. Org. Chem. 2003, 68, 6880-6886 DOI: 10.1021/jo0344182
 | 
|  
 (jul)2CH+
 | 0 | E Parameter: -9.45 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 indolecarboxylate derived iminium ion
 | dichloromethane | E Parameter: -9.50 
 |   | Angew. Chem. Int. Ed. 2009, 48, 5034-5037 DOI: 10.1002/anie.200900933
 | 
|  
 PhCH=N+(CH2)5 (in MeCN)
 | MeCN | E Parameter: -9.60 
 |    | J. Am. Chem. Soc. 2013, 135, 6579-6587 DOI: 10.1021/ja401106x
 | 
|  
 pTolCH=N+CH2 (in MeCN)
 | MeCN | E Parameter: -9.64 
 |    | J. Am. Chem. Soc. 2013, 135, 6579-6587 DOI: 10.1021/ja401106x
 | 
|  
 bis(julidin-9-yl)allylium ion
 |  | E Parameter: -9.78 
 |    | J. Org. Chem. 2011, 76, 9391-9408 DOI: 10.1021/jo201668w
 | 
|  
 pyrN+=CH-CH-Ph
 | 0 | E Parameter: -9.80 
 |    | Angew. Chem. Int. Ed. 2008, 47, 8723-8726 DOI: 10.1002/anie.200802889
 | 
|  
 1,1,3-tris(4-(dimethylamino)phenyl)allylium ion
 | 0 | E Parameter: -9.84 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 N-fluoropyridinium tetrafluoroborate
 | 0 | E Parameter: -9.89 
 |    | J. Am. Chem. Soc. 2018, 140, 11474-11486 DOI: 10.1021/jacs.8b07147
 | 
|  
 (lil)2CH+
 | 0 | E Parameter: -10.04 
 |      | J. Am. Chem. Soc. 2001, 123, 9500-9512 DOI: 10.1021/ja010890y
 | 
|  
 2-cinnamoyl-3-methyl-1-(perfluorophenyl)-1H-imidazol-3-ium
 | DMSO | E Parameter: -10.09 
 |    | Top. Catal. 2018, 61, 585-590 DOI: 10.1007/s11244-018-0914-5
 | 
|  
 Pd-allyl cation
 |  | E Parameter: -10.11 
 |    | Acc. Chem. Res. 2003, 36, 66-77 DOI: 10.1021/ar020094c
 | 
|  
 2-benzylidene-indan-1,3-dione
 | 0 | E Parameter: -10.11 
 |    | Org. Biomol. Chem. 2007, 5, 3020-3026 DOI: 10.1039/b708025e
 | 
|  
 diethyl azodicarboxylate
 | MeCN | E Parameter: -10.15 
 |    | Chem. Eur. J. 2010, 16, 11670-11677 DOI: 10.1002/chem.201001598
 | 
|  
 bis(1,2-dimethylindol-3-yl)methylium ion
 | 0 | E Parameter: -10.23 
 |    | J. Org. Chem. 2015, 80, 8643-8656 DOI: 10.1021/acs.joc.5b01298
 | 
|  
 p-(methoxy)benzylidene Meldrum's acid
 | 0 | E Parameter: -10.28 
 |    | J. Org. Chem. 2008, 73, 2738-2745 DOI: 10.1021/jo702590s
 | 
|  
 (4-NMe2)2-tritylium ion (= Malachite green)
 |  | E Parameter: -10.29 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 pipN+=CH-CH-Ph
 | 0 | E Parameter: -10.30 
 |  | Angew. Chem. Int. Ed. 2008, 47, 8723-8726 DOI: 10.1002/anie.200802889
 | 
|  
 aniBBS
 | 0 | E Parameter: -10.37 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 N-fluoro-2,4,6-trimethylpyridinium tetrafluoroborate
 | 0 | E Parameter: -10.46 
 |    | J. Am. Chem. Soc. 2018, 140, 11474-11486 DOI: 10.1021/jacs.8b07147
 | 
|  
 5,7,7-trichloro-8(7H)-quinolinone
 | MeCN | E Parameter: -10.48 
 |    | Org. Lett. 2010, 12, 2238-2241 DOI: 10.1021/ol100592j
 | 
|  
 (S,E)-5-benzyl-1-((E)-3-(4-(dimethylamino)phenyl)allylidene)-2,2,3-trimethyl-4-oxoimidazolidin-1-ium
 | dichloromethane | E Parameter: -10.60 
 |   | Asian J. Org. Chem. 2014, 3, 550-555 DOI: 10.1002/ajoc.201402009
 | 
|  
 p-AniCH=N+Me2 (in MeCN)
 | MeCN | E Parameter: -10.69 
 |    | J. Am. Chem. Soc. 2013, 135, 6579-6587 DOI: 10.1021/ja401106x
 | 
|  
 diisopropyl azodicarboxylate
 | MeCN | E Parameter: -10.71 
 |    | Chem. Eur. J. 2010, 16, 11670-11677 DOI: 10.1002/chem.201001598
 | 
|  
 dma(S)BBS
 | 0 | E Parameter: -10.73 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 p-(methoxy)benzylidenemalononitrile
 | 0 | E Parameter: -10.80 
 |    | J. Org. Chem. 2003, 68, 6880-6886 DOI: 10.1021/jo0344182
 | 
|  
 p-fluoranil (C-F)
 | 0 | E Parameter: -11.12 
 |    | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 2,6-di-tert-butyl-4-methylenecyclohexa-2,5-dien-1-one
 | 0 | E Parameter: -11.17 
 |    | Chem. Eur. J. 2025, 31, e202501224 DOI: 10.1002/chem.202501224
 | 
|  
 dicarbonyl(cyclopentadienyl)propene-iron(II)
 |  | E Parameter: -11.20 
 |    | Helv. Chim. Acta 2005, 88, 1754-1768 DOI: 10.1002/hlca.200590137
 | 
|  
 2,2,4-trichloro-1(2H)-naphthalenone
 | MeCN | E Parameter: -11.24 
 |    | Org. Lett. 2010, 12, 2238-2241 DOI: 10.1021/ol100592j
 | 
|  
 (4-NMe2)3-tritylium ion (= Crystal violet)
 |  | E Parameter: -11.26 
 |  | J. Am. Chem. Soc. 2003, 125, 286-295 DOI: 10.1021/ja021010y
 | 
|  
 maleic anhydride
 | DMSO | E Parameter: -11.31 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 2-(p-methoxybenzylidene)-indan-1,3-dione
 | 0 | E Parameter: -11.32 
 |    | Org. Biomol. Chem. 2007, 5, 3020-3026 DOI: 10.1039/b708025e
 | 
|  
 2-cinnamoyl-1-mesityl-3-methyl-1H-imidazol-3-ium
 | DMSO | E Parameter: -11.48 
 |    | Top. Catal. 2018, 61, 585-590 DOI: 10.1007/s11244-018-0914-5
 | 
|  
 (E)-N-benzylidene-4-methylbenzenesulfonamide (in DMSO)
 | DMSO | E Parameter: -11.50 
 |    | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 2-cinnamoyl-1,3-dimethyl-1H-imidazol-3-ium
 | DMSO | E Parameter: -11.52 
 |    | Angew. Chem. Int. Ed. 2012, 51, 5234-5238 DOI: 10.1002/anie.201109042
 | 
|  
 2,6-di-tert-butyl-4-(2,2,2-trifluoroethylidene)cyclohexa-2,5-dien-1-one
 | DMSO | E Parameter: -11.68 
 |    | Eur. J. Org. Chem. 2020, , 3812-3817 DOI: 10.1002/ejoc.202000295
 | 
|  
 2-benzylidenebenzo[d][1,3]dithiole 1,1,3,3-tetraoxide
 | DMSO | E Parameter: -11.78 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 | 
|  
 2-cinnamoyl-1-(4-methoxyphenyl)-3-methyl-1H-imidazol-3-ium
 | DMSO | E Parameter: -11.79 
 |    | Top. Catal. 2018, 61, 585-590 DOI: 10.1007/s11244-018-0914-5
 | 
|  
 1-(tert-butyl)-2-cinnamoyl-3-methyl-1H-imidazol-3-ium
 | DMSO | E Parameter: -11.80 
 |    | Top. Catal. 2018, 61, 585-590 DOI: 10.1007/s11244-018-0914-5
 | 
|  
 N-(difluoromethyl)thio)phthalimide
 | 0 | E Parameter: -11.86 
 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 2,6-diphenyl-4-benzylidenecyclohexa-2,5-dienone
 | 0 | E Parameter: -11.87 
 |    | Eur. J. Org. Chem. 2009, , 3203-3211 DOI: 10.1002/ejoc.200900299
 | 
|  
 2-(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)acetonitrile
 | 0 | E Parameter: -11.88 
 |    | Chem. Eur. J. 2025, 31, e202501224 DOI: 10.1002/chem.202501224
 | 
|  
 jul(S)BBS
 | 0 | E Parameter: -11.89 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 N-(trifluoromethyl)thio)phthalimide
 | 0 | E Parameter: -11.92 
 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 ethyl 2-(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)acetate
 | 0 | E Parameter: -12.01 
 |    | Chem. Eur. J. 2025, 31, e202501224 DOI: 10.1002/chem.202501224
 | 
|  
 o-chloranil (C-Cl)
 | 0 | E Parameter: -12.02 
 |    | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 2-cinnamoyl-1-(2,6-dimethoxyphenyl)-3-methyl-1H-imidazol-3-ium
 | DMSO | E Parameter: -12.02 
 |    | Top. Catal. 2018, 61, 585-590 DOI: 10.1007/s11244-018-0914-5
 | 
|  
 ethenesulfonyl fluoride (ESF)
 | DMSO | E Parameter: -12.09 
 |    | Angew. Chem. Int. Ed. 2016, 55, 12664-12667 DOI: 10.1002/anie.201601875
 | 
|  
 p-chloranil (C=O)
 | 0 | E Parameter: -12.13 
 |    | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 ani(Ph)2QM
 | 0 | E Parameter: -12.18 
 |     | Angew. Chem. Int. Ed. 2002, 41, 91-95 DOI: 10.1002/1521-3773(20020104)41:1<91::AID-ANIE91>3.0.CO;2-P
 | 
|  
 di-tert-butyl azodicarboxylate
 | MeCN | E Parameter: -12.23 
 |    | Chem. Eur. J. 2010, 16, 11670-11677 DOI: 10.1002/chem.201001598
 | 
|  
 2,5-dichloroquinone (C-H)
 | 0 | E Parameter: -12.28 
 |    | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 2,4-dinitrothiophene
 | 0 | E Parameter: -12.33 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 4-nitro-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -12.37 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 N-(trifluoromethyl)thio)succinimide
 | 0 | E Parameter: -12.56 
 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 4-cyano-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -12.61 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 dmaBBS
 | 0 | E Parameter: -12.76 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 p-(dimethylamino)benzylidene Meldrum's acid
 | 0 | E Parameter: -12.76 
 |    | J. Org. Chem. 2008, 73, 2738-2745 DOI: 10.1021/jo702590s
 | 
|  
 Umemoto II (triflate)
 | 0 | E Parameter: -12.80 
 |    | Eur. J. Org. Chem. 2024, 27, e202400085 DOI: 10.1002/ejoc.202400085
 | 
|  
 benzaldehyde (in DMSO)
 | DMSO | E Parameter: -12.90 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 3,6-dinitro-1-tosyl-1H-indole
 | 0 | E Parameter: -12.90 
 |    | Chem. Commun. 2021, 57, 10071-10074 DOI: 10.1039/d1cc04074j
 | 
|  
 (2-phenylethene-1,1-diyldisulfonyl)dibenzene
 | DMSO | E Parameter: -12.93 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 | 
|  
 2-(4-methoxybenzylidene)benzo[d][1,3]dithiole 1,1,3,3-tetraoxide
 | DMSO | E Parameter: -13.02 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 | 
|  
 (E)-N-(4-methoxybenzylidene)-4-methylbenzenesulfonamide (in DMSO)
 | DMSO | E Parameter: -13.05 
 |    | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 Umemoto I (triflate)
 | 0 | E Parameter: -13.08 
 |    | Eur. J. Org. Chem. 2024, 27, e202400085 DOI: 10.1002/ejoc.202400085
 | 
|  
 (E)-6-(4-nitrobenzylidene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -13.15 
 |    | Chem. Eur. J. 2025, 31, e202403785 DOI: 10.1002/chem.202403785
 | 
|  
 1,3,5-trinitrobenzene
 | 0 | E Parameter: -13.19 
 |    | J. Org. Chem. 2005, 70, 6242-6253 DOI: 10.1021/jo0505526
 | 
|  
 1,2-diaza-1,3-diene 1a
 | DMSO | E Parameter: -13.28 
 |    | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 p-(dimethylamino)benzylidenemalononitrile
 | 0 | E Parameter: -13.30 
 |    | J. Org. Chem. 2003, 68, 6880-6886 DOI: 10.1021/jo0344182
 | 
|  
 4-bromo-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -13.37 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 dma(Ph)2QM
 | 0 | E Parameter: -13.39 
 |     | Angew. Chem. Int. Ed. 2002, 41, 91-95 DOI: 10.1002/1521-3773(20020104)41:1<91::AID-ANIE91>3.0.CO;2-P
 | 
|  
 Umemoto I (tetrafluoroborate)
 | 0 | E Parameter: -13.39 
 |    | Eur. J. Org. Chem. 2024, 27, e202400085 DOI: 10.1002/ejoc.202400085
 | 
|  
 N-methyl-N-((trifluoromethyl)thio)-p-toluenesulfonamide
 | 0 | E Parameter: -13.44 
 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 (E)-6-(4-(trifluoromethyl)benzylidene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -13.54 
 |    | Chem. Eur. J. 2025, 31, e202403785 DOI: 10.1002/chem.202403785
 | 
|  
 2-(p-(dimethylamino)benzylidene)-indan-1,3-dione
 | 0 | E Parameter: -13.56 
 |    | Org. Biomol. Chem. 2007, 5, 3020-3026 DOI: 10.1039/b708025e
 | 
|  
 2,6-di-tert-butyl-4-ethylidenecyclohexa-2,5-dien-1-one
 | 0 | E Parameter: -13.68 
 |    | Chem. Eur. J. 2025, 31, e202501224 DOI: 10.1002/chem.202501224
 | 
|  
 ((2-phenylpropan-2-yl)oxy)(trifluoromethyl)sulfane
 | 0 | E Parameter: -13.77 
 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 julBBS
 | 0 | E Parameter: -13.84 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 p-chloranil (C-Cl)
 | 0 | E Parameter: -13.84 
 |    | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 <i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -13.85 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 (2-(4-methoxyphenyl)ethene-1,1-diyldisulfonyl)dibenzene
 | DMSO | E Parameter: -13.88 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 | 
|  
 1,2-diaza-1,3-diene 1b
 | DMSO | E Parameter: -13.90 
 |    | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 jul Meldrum's acid
 | 0 | E Parameter: -13.97 
 |    | J. Org. Chem. 2008, 73, 2738-2745 DOI: 10.1021/jo702590s
 | 
|  
 (E)-6-(4-chlorobenzylidene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -13.99 
 |    | Chem. Eur. J. 2025, 31, e202403785 DOI: 10.1002/chem.202403785
 | 
|  
 (E)-6-(3-fluorobenzylidene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -14.00 
 |    | Chem. Eur. J. 2025, 31, e202403785 DOI: 10.1002/chem.202403785
 | 
|  
 N-methyl maleimide
 | DMSO | E Parameter: -14.07 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 ethyl 3-nitro-1H-indole-1-carboxylate
 | 0 | E Parameter: -14.10 
 |   | Chem. Commun. 2021, 57, 10071-10074 DOI: 10.1039/d1cc04074j
 | 
|  
 [(1,3-Diarylallyl)Pd(PPh3)2]+ (Aryl = Ph)
 |  | E Parameter: -14.14 
 |    | Organometallics 2012, 31, 2416-2424 DOI: 10.1021/om3000357
 | 
|  
 [(1,3-Diarylallyl)Pd(PPh3)2]+ (Aryl = 3,5-difluorophenyl)
 |  | E Parameter: -14.21 
 |    | Organometallics 2012, 31, 2416-2424 DOI: 10.1021/om3000357
 | 
|  
 (E)-tert-butyl benzylidenecarbamate (in DMSO)
 | DMSO | E Parameter: -14.22 
 |    | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 4-methyl-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -14.23 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 2,6-di-tert.butyl-4-(4-nitrobenzylidene)cyclohexa-2,5-dienone
 | 0 | E Parameter: -14.36 
 |    | Eur. J. Org. Chem. 2009, , 3203-3211 DOI: 10.1002/ejoc.200900299
 | 
|  
 [(1,3-Diarylallyl)Pd(PPh3)2]+ (Aryl = 4-(dimethylamino)phenyl)
 |  | E Parameter: -14.46 
 |    | Organometallics 2012, 31, 2416-2424 DOI: 10.1021/om3000357
 | 
|  
 (E)-6-benzylidenebenzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -14.47 
 |    | Chem. Eur. J. 2025, 31, e202403785 DOI: 10.1002/chem.202403785
 | 
|  
 2,6-di-tert.butyl-4-(3,5-difluorobenzylidene)cyclohexa-2,5-dienone
 | 0 | E Parameter: -14.50 
 |    | Eur. J. Org. Chem. 2009, , 3203-3211 DOI: 10.1002/ejoc.200900299
 | 
|  
 ((2-(2-iodophenyl)propan-2-yl)oxy)(trifluoromethyl)sulfane
 | 0 | E Parameter: -14.52 
 |    | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 2-(4-methoxybenzylidene)-1,3-dithiane 1,1,3,3-tetraoxide
 | DMSO | E Parameter: -14.55 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 | 
|  
 4-bromo-3-nitro-1-tosyl-1H-indole
 | 0 | E Parameter: -14.60 
 |   | Chem. Commun. 2021, 57, 10071-10074 DOI: 10.1039/d1cc04074j
 | 
|  
 jul-indan-1,3-dione
 | 0 | E Parameter: -14.68 
 |    | Org. Biomol. Chem. 2007, 5, 3020-3026 DOI: 10.1039/b708025e
 | 
|  
 4-methoxy-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -14.70 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 (E)-6-(4-methylbenzylidene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -14.85 
 |    | Chem. Eur. J. 2025, 31, e202403785 DOI: 10.1002/chem.202403785
 | 
|  
 3-nitro-1-tosyl-1H-indole
 | 0 | E Parameter: -14.87 
 |    | Chem. Commun. 2021, 57, 10071-10074 DOI: 10.1039/d1cc04074j
 | 
|  
 1,2-diaza-1,3-diene 1e
 | MeOH | E Parameter: -14.90 
 |  | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 1,2-diaza-1,3-diene 1c
 | DMSO | E Parameter: -14.91 
 |    | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 2,6-di-tert.butyl-4-(3-fluorobenzylidene)cyclohexa-2,5-dienone
 | 0 | E Parameter: -15.03 
 |    | Eur. J. Org. Chem. 2009, , 3203-3211 DOI: 10.1002/ejoc.200900299
 | 
|  
 (E)-N-(4-(dimethylamino)benzylidene)-4-methylbenzenesulfonamide (in DMSO)
 | DMSO | E Parameter: -15.09 
 |    | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 2,6-di-tert-butyl-4-(methoxymethylene)cyclohexa-2,5-dien-1-one
 | 0 | E Parameter: -15.10 
 |    | Chem. Eur. J. 2025, 31, e202501224 DOI: 10.1002/chem.202501224
 | 
|  
 (E)-6-(4-methoxybenzylidene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -15.20 
 |    | Chem. Eur. J. 2025, 31, e202403785 DOI: 10.1002/chem.202403785
 | 
|  
 1-phenylprop-2-en-1-one (in DMSO)
 | DMSO | E Parameter: -15.25 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 1,2-diaza-1,3-diene 1f
 | MeOH | E Parameter: -15.30 
 |  | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 1,2-diaza-1,3-diene 1d
 | DMSO | E Parameter: -15.38 
 |    | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 phenyl isocyanate
 | MeCN | E Parameter: -15.38 
 |    | J. Am. Chem. Soc. 2020, 142, 8383-8402 DOI: 10.1021/jacs.0c01960
 | 
|  
 (E)-6-((1-methyl-1H-indol-2-yl)methylene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -15.55 
 |    | Org. Biomol. Chem. 2025, 23, 827-834 DOI: 10.1039/D4OB01855A
 | 
|  
 4-benzylidene-2,6-di-tert-butylcyclohexa-2,5-dien-1-one
 | 0 | E Parameter: -15.58 
 |    | Chem. Eur. J. 2025, 31, e202501224 DOI: 10.1002/chem.202501224
 | 
|  
 1-methylsulfanylpropan-2-one (in DMSO)
 | DMSO | E Parameter: -15.60 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 fumaronitrile
 | DMSO | E Parameter: -15.71 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 (E)-6-(furan-2-ylmethylene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -15.73 
 |    | Org. Biomol. Chem. 2025, 23, 827-834 DOI: 10.1039/D4OB01855A
 | 
|  
 tol(t-Bu)2QM
 | 0 | E Parameter: -15.83 
 |     | Angew. Chem. Int. Ed. 2002, 41, 91-95 DOI: 10.1002/1521-3773(20020104)41:1<91::AID-ANIE91>3.0.CO;2-P
 | 
|  
 (E)-N-benzylidene-P,P-diphenylphosphinic amide
 | DMSO | E Parameter: -15.89 
 |    | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 p-nitrophenyl isothiocyanate
 | DMSO | E Parameter: -15.89 
 |    | J. Am. Chem. Soc. 2020, 142, 8383-8402 DOI: 10.1021/jacs.0c01960
 | 
|  
 (E)-6-((E)-3-phenylallylidene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -16.00 
 |    | Org. Biomol. Chem. 2025, 23, 827-834 DOI: 10.1039/D4OB01855A
 | 
|  
 (E)-6-(4-(dimethylamino)benzylidene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -16.07 
 |    | Chem. Eur. J. 2025, 31, e202403785 DOI: 10.1002/chem.202403785
 | 
|  
 ani(t-Bu)2QM
 |  | E Parameter: -16.11 
 |     | Angew. Chem. Int. Ed. 2002, 41, 91-95 DOI: 10.1002/1521-3773(20020104)41:1<91::AID-ANIE91>3.0.CO;2-P
 | 
|  
 2,5-dichloroquinone (C-Cl)
 | 0 | E Parameter: -16.11 
 |    | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 p-quinone (C-H)
 | 0 | E Parameter: -16.19 
 |   | J. Am. Chem. Soc. 2014, 136, 11499-11512 DOI: 10.1021/ja505613b
 | 
|  
 (E)-2,6-di-tert-butyl-4-(3-(4-nitrophenyl)allylidene)cyclohexa-2,5-dien-1-one
 | DMSO | E Parameter: -16.25 
 |    | Org. Lett. 2020, 22, 2182-2186 DOI: 10.1021/acs.orglett.0c00338
 | 
|  
 2,6-dimethyl-4-(4-(dimethylamino)benzylidene)cyclohexa-2,5-dienone
 | 0 | E Parameter: -16.36 
 |    | Eur. J. Org. Chem. 2009, , 3203-3211 DOI: 10.1002/ejoc.200900299
 | 
|  
 2,6-dimethoxy-4-(4-methoxybenzylidene)cyclohexa-2,5-dienone
 | 0 | E Parameter: -16.38 
 |    | Eur. J. Org. Chem. 2009, , 3203-3211 DOI: 10.1002/ejoc.200900299
 | 
|  
 4-(2,2-bis(phenylsulfonyl)vinyl)-N,N-dimethylaniline
 | DMSO | E Parameter: -16.53 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 | 
|  
 butynone
 | 0 | E Parameter: -16.60 
 |  | Angew. Chem. Int. Ed.  2019, 58, 17704-17708 DOI: 10.1002/anie.201909803
 | 
|  
 2-phenylethene-1-sulfonyl fluoride
 | DMSO | E Parameter: -16.63 
 |    | Angew. Chem. Int. Ed. 2016, 55, 12664-12667 DOI: 10.1002/anie.201601875
 | 
|  
 but-3-en-2-one (in DMSO)
 | DMSO | E Parameter: -16.76 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 E)-2,6-di-tert-butyl-4-(3-(4-chlorophenyl)allylidene)cyclohexa-2,5-dien-1-one
 | DMSO | E Parameter: -16.84 
 |    | Org. Lett. 2020, 22, 2182-2186 DOI: 10.1021/acs.orglett.0c00338
 | 
|  
 thian-4-one (in DMSO)
 | DMSO | E Parameter: -16.90 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 4-phenylbut-3-yn-2-one
 | 0 | E Parameter: -16.90 
 |  | Angew. Chem. Int. Ed.  2019, 58, 17704-17708 DOI: 10.1002/anie.201909803
 | 
|  
 (E)-2,6-di-tert-butyl-4-(3-phenylallylidene)cyclohexa-2,5-dien-1-one
 | DMSO | E Parameter: -17.00 
 |    | Org. Lett. 2020, 22, 2182-2186 DOI: 10.1021/acs.orglett.0c00338
 | 
|  
 (E)-6-((1-methyl-1H-pyrrol-2-yl)methylene)benzo[d][1,3]dioxol-5(6H)-one
 | 0 | E Parameter: -17.03 
 |    | Org. Biomol. Chem. 2025, 23, 827-834 DOI: 10.1039/D4OB01855A
 | 
|  
 2,6-dimethoxy-4-(4-(dimethylamino)benzylidene)cyclohexa-2,5-dienone
 | 0 | E Parameter: -17.18 
 |    | Eur. J. Org. Chem. 2009, , 3203-3211 DOI: 10.1002/ejoc.200900299
 | 
|  
 dma(t-Bu)2QM
 |  | E Parameter: -17.29 
 |     | Angew. Chem. Int. Ed. 2002, 41, 91-95 DOI: 10.1002/1521-3773(20020104)41:1<91::AID-ANIE91>3.0.CO;2-P
 | 
|  
 bh 6m
 |  | E Parameter: -17.30 
 |  | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 (E)-3-(4-nitro-phenyl)-1-phenyl-prop-2-en-1-one (in DMSO)
 | DMSO | E Parameter: -17.33 
 |    | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 (E)-2,6-di-tert-butyl-4-(3-(4-methoxyphenyl)allylidene)cyclohexa-2,5-dien-1-one
 | DMSO | E Parameter: -17.42 
 |    | Org. Lett. 2020, 22, 2182-2186 DOI: 10.1021/acs.orglett.0c00338
 | 
|  
 cyclobutanone (in DMSO)
 | DMSO | E Parameter: -17.50 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 (E)-3-(4-cyano-phenyl)-1-phenyl-prop-2-en-1-one (in DMSO)
 | DMSO | E Parameter: -17.64 
 |    | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 diethyl 4-nitrobenzylidene malonate
 | 0 | E Parameter: -17.67 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 carbon disulfide
 | DMSO | E Parameter: -17.70 
 |    | J. Am. Chem. Soc. 2020, 142, 8383-8402 DOI: 10.1021/jacs.0c01960
 | 
|  
 diethyl fumarate
 | DMSO | E Parameter: -17.79 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 jul(t-Bu)2QM
 | 0 | E Parameter: -17.90 
 |     | Angew. Chem. Int. Ed. 2002, 41, 91-95 DOI: 10.1002/1521-3773(20020104)41:1<91::AID-ANIE91>3.0.CO;2-P
 | 
|  
 bh6j
 |  | E Parameter: -17.90 
 |   | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 oxan-4-one (in DMSO)
 | DMSO | E Parameter: -17.90 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 hex-3-yn-2-one
 | 0 | E Parameter: -17.90 
 |  | Angew. Chem. Int. Ed.  2019, 58, 17704-17708 DOI: 10.1002/anie.201909803
 | 
|  
 diethyl 4-cyano-benzylidene malonate
 | 0 | E Parameter: -18.06 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 phenyl isothiocyanate
 | DMSO | E Parameter: -18.15 
 |    | J. Am. Chem. Soc. 2020, 142, 8383-8402 DOI: 10.1021/jacs.0c01960
 | 
|  
 bh 6k
 |  | E Parameter: -18.20 
 |  | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 1,4-dioxaspiro[4.5]decan-8-one (in DMSO)
 | DMSO | E Parameter: -18.20 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 dimethyl diazomalonate
 | 0 | E Parameter: -18.20 
 |    | Chem. Eur. J. 2022, 28, e202201376 DOI: 10.1002/chem.202201376
 | 
|  
 (p-nitrophenyl)diazomethane
 | 0 | E Parameter: -18.30 
 |    | Chem. Eur. J. 2022, 28, e202201376 DOI: 10.1002/chem.202201376
 | 
|  
 ethenylsulfonylbenzene (in DMSO)
 | DMSO | E Parameter: -18.36 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 1-methylpiperidin-4-one (in DMSO)
 | DMSO | E Parameter: -18.40 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 methyl diazoacetate
 | 0 | E Parameter: -18.50 
 |    | Chem. Eur. J. 2022, 28, e202201376 DOI: 10.1002/chem.202201376
 | 
|  
 bh6a
 |  | E Parameter: -18.60 
 |   | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 methyl prop-2-enoate (in DMSO)
 | DMSO | E Parameter: -18.84 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 bh 6f
 |  | E Parameter: -18.90 
 |   | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 bh 6l
 |  | E Parameter: -18.90 
 |  | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 diethyl 3-chloro-benzylidene malonate
 | 0 | E Parameter: -18.98 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 acrylonitrile (in DMSO)
 | DMSO | E Parameter: -19.05 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 ethyl prop-2-enoate (in DMSO)
 | DMSO | E Parameter: -19.07 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 bh 6i
 |  | E Parameter: -19.10 
 |   | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 (E)-4,4-dimethyl-1-(4-nitrophenyl)pent-1-en-3-one
 | DMSO | E Parameter: -19.15 
 |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 (E)-4-methyl-1-(4-nitrophenyl)pent-1-en-3-one (in DMSO)
 | DMSO | E Parameter: -19.17 
 |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 (E)-4-(4-nitrophenyl)but-3-en-2-one (in DSMO)
 | DMSO | E Parameter: -19.36 
 |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 (E)-1,3-diphenylprop-2-en-1-one (in DMSO)
 | DMSO | E Parameter: -19.39 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 3-methylenedihydrofuranone
 | DMSO | E Parameter: -19.40 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 diethyl maleate
 | DMSO | E Parameter: -19.49 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 3-methylenetetrahydropyran-2-one
 | DMSO | E Parameter: -19.50 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 cyclohexanone (in DMSO)
 | DMSO | E Parameter: -19.90 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 diphenylcarbodiimide
 | DMSO | E Parameter: -20.14 
 |    | J. Am. Chem. Soc. 2020, 142, 8383-8402 DOI: 10.1021/jacs.0c01960
 | 
|  
 tert-butyl prop-2-enoate (in DMSO)
 | DMSO | E Parameter: -20.22 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 diethyl benzylidene malonate
 | 0 | E Parameter: -20.55 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 cyclopentenone
 | DMSO | E Parameter: -20.60 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 furan-2(5H)-one
 | DMSO | E Parameter: -20.70 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 cyclopentanone (in DMSO)
 | DMSO | E Parameter: -21.00 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 diethyl 4-methyl-benzylidene malonate
 | 0 | E Parameter: -21.11 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 diphenyldiazomethane
 | 0 | E Parameter: -21.40 
 |  | Chem. Eur. J. 2022, 28, e202201376 DOI: 10.1002/chem.202201376
 | 
|  
 diethyl 4-methoxy-benzylidene malonate
 | 0 | E Parameter: -21.47 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 dihydro-2H-pyran-2-one
 | DMSO | E Parameter: -21.80 
 |   | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 cycloheptenone
 | DMSO | E Parameter: -22.00 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 cycloheptanone (in DMSO)
 | DMSO | E Parameter: -22.10 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 2-methylcyclopentenone
 | DMSO | E Parameter: -22.10 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 cyclohexenone
 | DMSO | E Parameter: -22.10 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 pentan-2-one (in DMSO)
 | DMSO | E Parameter: -22.30 
 |  | J. Am. Chem. Soc. 2018, 140, 5500-5515 DOI: 10.1021/jacs.8b01657
 | 
|  
 ethyl 2-methylprop-2-enoate (in DMSO)
 | DMSO | E Parameter: -22.77 
 |   | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 (E)-4-phenylbut-3-en-2-one (in DMSO)
 | DMSO | E Parameter: -23.01 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 diethyl 4-(dimethylamino)benzylidene malonate
 | 0 | E Parameter: -23.10 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 N-methyl-N-((trifluoromethyl)thio)-aniline
 | 0 | E Parameter: -23.32 
 |  | Angew. Chem. Int. Ed. 2018, 57, 12690-12695 DOI: 10.1002/anie.201805859
 | 
|  
 diethyl 2-((1-methyl-1,2,3,4-tetrahydroquinolin-6-yl)methylene)malonate
 | 0 | E Parameter: -23.40 
 |  | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 N,N-dimethylprop-2-enamide (in DMSO)
 | DMSO | E Parameter: -23.54 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 ethyl (E)-but-2-enoate (in DMSO)
 | DMSO | E Parameter: -23.59 
 |   | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 diethyl 2-((julolidine-9-yl)methylene)malonate
 | 0 | E Parameter: -23.80 
 |  | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 ethyl cinnamate (in DMSO)
 | DMSO | E Parameter: -24.52 
 |   | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 cinnamonitrile (in DMSO)
 | DMSO | E Parameter: -24.60 
 |  | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 (E)-1-methyl-4-(styrylsulfonyl)benzene (in DMSO)
 | DMSO | E Parameter: -24.69 
 |   | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 2-methylcyclohexenone
 | DMSO | E Parameter: -27.50 
 |  | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 3-methylcyclopentenone
 | DMSO | E Parameter: -28.90 
 |  | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 3-methylcyclohexenone
 | DMSO | E Parameter: -29.60 
 |  | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 3-chloro-benzaldehyde (in DMSO)
 | DMSO |  |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 3-fluoro-benzaldehyde (in DMSO)
 | DMSO |  |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 3-methoxy-benzaldehyde (in DMSO)
 | DMSO |  |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 4-fluoro-benzaldehyde (in DMSO)
 | DMSO |  |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 hexanal (in DMSO)
 | DMSO |  |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 butanal (in DMSO)
 | DMSO |  |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 cinnamaldehyde (in DMSO)
 | DMSO |  |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 | 
|  
 p-nitro-cinnamaldehyde (in DMSO)
 | DMSO |  |  | J. Am. Chem. Soc. 2011, 133, 8240-8251 DOI: 10.1021/ja200820m
 |