|  
 3-methylcyclohexenone
 | DMSO | E Parameter: -29.60 
 |  | 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
 | 
|  
 2-methylcyclohexenone
 | DMSO | E Parameter: -27.50 
 |  | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 (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
 | 
|  
 cinnamonitrile (in DMSO)
 | DMSO | E Parameter: -24.60 
 |  | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 ethyl cinnamate (in DMSO)
 | DMSO | E Parameter: -24.52 
 |   | 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 (E)-but-2-enoate (in DMSO)
 | DMSO | E Parameter: -23.59 
 |   | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 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
 | 
|  
 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
 | 
|  
 diethyl 4-(dimethylamino)benzylidene malonate
 | 0 | E Parameter: -23.10 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 (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
 | 
|  
 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
 | 
|  
 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
 | 
|  
 cycloheptenone
 | DMSO | E Parameter: -22.00 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 dihydro-2H-pyran-2-one
 | DMSO | E Parameter: -21.80 
 |   | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 diethyl 4-methoxy-benzylidene malonate
 | 0 | E Parameter: -21.47 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 diethyl 4-methyl-benzylidene malonate
 | 0 | E Parameter: -21.11 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 furan-2(5H)-one
 | DMSO | E Parameter: -20.70 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 cyclopentenone
 | DMSO | E Parameter: -20.60 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 diethyl benzylidene malonate
 | 0 | E Parameter: -20.55 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 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
 | 
|  
 3-methylenetetrahydropyran-2-one
 | DMSO | E Parameter: -19.50 
 |    | 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-methylenedihydrofuranone
 | DMSO | E Parameter: -19.40 
 |    | Chem. Sci. 2021, 12, 4850-4865 DOI: 10.1039/D0SC06628A
 | 
|  
 (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
 | 
|  
 (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)-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-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
 | 
|  
 bh 6i
 |  | E Parameter: -19.10 
 |   | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 ethyl prop-2-enoate (in DMSO)
 | DMSO | E Parameter: -19.07 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 acrylonitrile (in DMSO)
 | DMSO | E Parameter: -19.05 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 diethyl 3-chloro-benzylidene malonate
 | 0 | E Parameter: -18.98 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 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
 | 
|  
 methyl prop-2-enoate (in DMSO)
 | DMSO | E Parameter: -18.84 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 bh6a
 |  | E Parameter: -18.60 
 |   | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 ethenylsulfonylbenzene (in DMSO)
 | DMSO | E Parameter: -18.36 
 |    | J. Am. Chem. Soc. 2017, 139, 13318-13329 DOI: 10.1021/jacs.7b05106
 | 
|  
 bh 6k
 |  | E Parameter: -18.20 
 |  | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 diethyl 4-cyano-benzylidene malonate
 | 0 | E Parameter: -18.06 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 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
 | 
|  
 hex-3-yn-2-one
 | 0 | E Parameter: -17.90 
 |  | Angew. Chem. Int. Ed.  2019, 58, 17704-17708 DOI: 10.1002/anie.201909803
 | 
|  
 diethyl fumarate
 | DMSO | E Parameter: -17.79 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 diethyl 4-nitrobenzylidene malonate
 | 0 | E Parameter: -17.67 
 |    | Chem. Eur. J. 2008, 14, 9675-9682 DOI: 10.1002/chem.200801277
 | 
|  
 (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
 | 
|  
 (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
 | 
|  
 (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
 | 
|  
 bh 6m
 |  | E Parameter: -17.30 
 |  | Chem. Eur. J. 2010, 16, 1365-1371 DOI: 10.1002/chem.200902487
 | 
|  
 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
 | 
|  
 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
 | 
|  
 (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
 | 
|  
 (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
 | 
|  
 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-(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
 | 
|  
 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
 | 
|  
 2-phenylethene-1-sulfonyl fluoride
 | DMSO | E Parameter: -16.63 
 |    | Angew. Chem. Int. Ed. 2016, 55, 12664-12667 DOI: 10.1002/anie.201601875
 | 
|  
 butynone
 | 0 | E Parameter: -16.60 
 |  | Angew. Chem. Int. Ed.  2019, 58, 17704-17708 DOI: 10.1002/anie.201909803
 | 
|  
 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
 | 
|  
 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
 | 
|  
 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
 | 
|  
 (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
 | 
|  
 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
 | 
|  
 (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
 | 
|  
 (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
 | 
|  
 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)-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
 | 
|  
 fumaronitrile
 | DMSO | E Parameter: -15.71 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 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
 | 
|  
 (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
 | 
|  
 1,2-diaza-1,3-diene 1d
 | DMSO | E Parameter: -15.38 
 |    | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 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-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
 | 
|  
 (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
 | 
|  
 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
 | 
|  
 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
 | 
|  
 1,2-diaza-1,3-diene 1c
 | DMSO | E Parameter: -14.91 
 |    | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 1,2-diaza-1,3-diene 1e
 | MeOH | E Parameter: -14.90 
 |  | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 (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
 | 
|  
 4-methoxy-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -14.70 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 jul-indan-1,3-dione
 | 0 | E Parameter: -14.68 
 |    | Org. Biomol. Chem. 2007, 5, 3020-3026 DOI: 10.1039/b708025e
 | 
|  
 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
 | 
|  
 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
 | 
|  
 (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-(4-nitrobenzylidene)cyclohexa-2,5-dienone
 | 0 | E Parameter: -14.36 
 |    | Eur. J. Org. Chem. 2009, , 3203-3211 DOI: 10.1002/ejoc.200900299
 | 
|  
 4-methyl-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -14.23 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 N-methyl maleimide
 | DMSO | E Parameter: -14.07 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 (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
 | 
|  
 (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
 | 
|  
 jul Meldrum's acid
 | 0 | E Parameter: -13.97 
 |    | J. Org. Chem. 2008, 73, 2738-2745 DOI: 10.1021/jo702590s
 | 
|  
 1,2-diaza-1,3-diene 1b
 | DMSO | E Parameter: -13.90 
 |    | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 (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
 | 
|  
 <i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -13.85 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 julBBS
 | 0 | E Parameter: -13.84 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 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-(p-(dimethylamino)benzylidene)-indan-1,3-dione
 | 0 | E Parameter: -13.56 
 |    | Org. Biomol. Chem. 2007, 5, 3020-3026 DOI: 10.1039/b708025e
 | 
|  
 (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
 | 
|  
 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
 | 
|  
 4-bromo-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -13.37 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 p-(dimethylamino)benzylidenemalononitrile
 | 0 | E Parameter: -13.30 
 |    | J. Org. Chem. 2003, 68, 6880-6886 DOI: 10.1021/jo0344182
 | 
|  
 1,2-diaza-1,3-diene 1a
 | DMSO | E Parameter: -13.28 
 |    | Chem. Eur. J. 2010, 16, 12008-12016 DOI: 10.1002/chem.201000828
 | 
|  
 (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
 | 
|  
 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
 | 
|  
 (2-phenylethene-1,1-diyldisulfonyl)dibenzene
 | DMSO | E Parameter: -12.93 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 | 
|  
 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
 | 
|  
 4-cyano-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -12.61 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 4-nitro-<i>trans-beta</i>-nitrostyrene
 |  | E Parameter: -12.37 
 |    | J. Org. Chem. 2011, 76, 9370-9378 DOI: 10.1021/jo201678u
 | 
|  
 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
 | 
|  
 ethenesulfonyl fluoride (ESF)
 | DMSO | E Parameter: -12.09 
 |    | Angew. Chem. Int. Ed. 2016, 55, 12664-12667 DOI: 10.1002/anie.201601875
 | 
|  
 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
 | 
|  
 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
 | 
|  
 jul(S)BBS
 | 0 | E Parameter: -11.89 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 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
 | 
|  
 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
 | 
|  
 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
 | 
|  
 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
 | 
|  
 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
 | 
|  
 2,6-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-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-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
 | 
|  
 2-(p-methoxybenzylidene)-indan-1,3-dione
 | 0 | E Parameter: -11.32 
 |    | Org. Biomol. Chem. 2007, 5, 3020-3026 DOI: 10.1039/b708025e
 | 
|  
 maleic anhydride
 | DMSO | E Parameter: -11.31 
 |    | Eur. J. Org. Chem. 2014, , 2956-2963 DOI: 10.1002/ejoc.201301779
 | 
|  
 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
 | 
|  
 p-(methoxy)benzylidenemalononitrile
 | 0 | E Parameter: -10.80 
 |    | J. Org. Chem. 2003, 68, 6880-6886 DOI: 10.1021/jo0344182
 | 
|  
 dma(S)BBS
 | 0 | E Parameter: -10.73 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 aniBBS
 | 0 | E Parameter: -10.37 
 |    | J. Org. Chem. 2007, 72, 9170-9180 DOI: 10.1021/jo071273g
 | 
|  
 p-(methoxy)benzylidene Meldrum's acid
 | 0 | E Parameter: -10.28 
 |    | J. Org. Chem. 2008, 73, 2738-2745 DOI: 10.1021/jo702590s
 | 
|  
 2-benzylidene-indan-1,3-dione
 | 0 | E Parameter: -10.11 
 |    | Org. Biomol. Chem. 2007, 5, 3020-3026 DOI: 10.1039/b708025e
 | 
|  
 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
 | 
|  
 benzylidenemalononitrile
 | 0 | E Parameter: -9.42 
 |    | J. Org. Chem. 2003, 68, 6880-6886 DOI: 10.1021/jo0344182
 | 
|  
 benzylidene-Meldrum's acid
 | 0 | E Parameter: -9.15 
 |    | J. Org. Chem. 2008, 73, 2738-2745 DOI: 10.1021/jo702590s
 | 
|  
 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
 | 
|  
 (ethene-1,1-diyldisulfonyl)dibenzene
 | DMSO | E Parameter: -7.50 
 |    | Chem. Asian J. 2012, 7, 1401-1407 DOI: 10.1002/asia.201101046
 |