Mayr's Database of Reactivity Parameters

Electrophiles

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Name Solvent Reactivity
Parameters
Classification Reference
(title or year)
tritylium ion (Ph3C+)
C19H15 *

E Param.: 0.51

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-CF3)2-tritylium ion
*

E Param.: 2.28

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(3-Cl)3-tritylium ion
*

E Param.: 1.99

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-CF3)-tritylium ion
*

E Param.: 1.33

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(3-Cl)-tritylium ion
*

E Param.: 1.06

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(3-CF3)-tritylium ion
*

E Param.: 1.18

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-Me)-tritylium ion
*

E Param.: -0.13

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-Me)2-tritylium ion
*

E Param.: -0.70

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-Me)3-tritylium ion
*

E Param.: -1.21

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-MeO,3-OMe)-tritylium ion
*

E Param.: -1.62

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-OMe,3-Me)-tritylium ion
*

E Param.: -1.84

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-MeO)-tritylium ion
*

E Param.: -1.59

- Eur. J. Org. Chem. 2011, , 6470-6475
10.1002/ejoc.201100910
(4-MeO,4-Me)-tritylium ion
*

E Param.: -2.13

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-MeO)2-tritylium ion
*

E Param.: -3.04

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-MeO)3-tritylium ion
*

E Param.: -4.35

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-NMe2)-tritylium ion
*

E Param.: -7.93

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-NMe2)2-tritylium ion (= Malachite green)
*

E Param.: -10.29

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-NMe2)3-tritylium ion (= Crystal violet)
*

E Param.: -11.26

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
3-chloro-benzaldehyde (in DMSO)
C7H5ClO *
DMSO - J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
3-fluoro-benzaldehyde (in DMSO)
C7H5FO *
DMSO - J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
3-methoxy-benzaldehyde (in DMSO)
C8H8O2 *
DMSO - J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
4-fluoro-benzaldehyde (in DMSO)
C7H5FO *
DMSO - J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
hexanal (in DMSO)
C6H12O *
DMSO - J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
butanal (in DMSO)
C4H8O *
DMSO - J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
cinnamaldehyde (in DMSO)
C9H8O *
DMSO - J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
p-nitro-cinnamaldehyde (in DMSO)
C9H7NO3 *
DMSO - J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
dibenzo[a,d]tropylium ion
C15H11 *
dichloromethane

E Param.: -0.63

- Liebigs Ann. 1995, , 2005-2009
10.1002/jlac.1995199[...]
4-phenylbut-3-yn-2-one
C10H8O *

E Param.: -16.90

- Angew. Chem. Int. Ed. 2019, 58, 17704-17708
10.1002/anie.201909803
hex-3-yn-2-one
C6H8O *

E Param.: -17.90

- Angew. Chem. Int. Ed. 2019, 58, 17704-17708
10.1002/anie.201909803
diphenyldiazomethane
C13H10N2 *

E Param.: -21.40

- Chem. Eur. J. 2022, 28, e202201376
10.1002/chem.202201376
butynone
C4H4O *

E Param.: -16.60

- Angew. Chem. Int. Ed. 2019, 58, 17704-17708
10.1002/anie.201909803
Me2C=C=N(+)Me2
*

E Param.: -2.80

- Synthesis 2025, 57, 3251-3262
10.1055/a-2649-1999
Ph2C=C=N(+)Me2
*

E Param.: -1.90

- Synthesis 2025, 57, 3251-3262
10.1055/a-2649-1999
fc(Me)CH+
C12H13Fe *

E Param.: -2.57

* Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
dimethylmethyleneammonium ion
C3H8N *

E Param.: -6.69

* Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
methyl(phenyl)methyleneammonium ion
C8H10N *

E Param.: -5.17

* Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
Vilsmeier ion
C3H7ClN *

E Param.: -5.77

* Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
(2,4,6-trimethylphenyl)ethylium ion
C11H15 *

E Param.: 6.04

* Macromolecules 2005, 38, 33-40
10.1021/ma048389o
1,3-bis(2,4,6-trimethylphenyl)but-1-ylium ion
C22H29 *

E Param.: 6.16

* Macromolecules 2005, 38, 33-40
10.1021/ma048389o
diethyl 2-((1-methyl-1,2,3,4-tetrahydroquinolin-6-yl)methylene)malonate
C18H23NO4 *

E Param.: -23.40

* Chem. Eur. J. 2008, 14, 9675-9682
10.1002/chem.200801277
diethyl 2-((julolidine-9-yl)methylene)malonate
C20H25NO4 *

E Param.: -23.80

* Chem. Eur. J. 2008, 14, 9675-9682
10.1002/chem.200801277
pipN+=CH-CH-Ph
C14H18N+ *

E Param.: -10.30

* Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
bh 6k
*

E Param.: -18.20

* Chem. Eur. J. 2010, 16, 1365-1371
10.1002/chem.200902487
bh 6l
*

E Param.: -18.90

* Chem. Eur. J. 2010, 16, 1365-1371
10.1002/chem.200902487
bh 6m
*

E Param.: -17.30

* Chem. Eur. J. 2010, 16, 1365-1371
10.1002/chem.200902487
1,2-diaza-1,3-diene 1e
*
MeOH

E Param.: -14.90

* Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
1,2-diaza-1,3-diene 1f
*
MeOH

E Param.: -15.30

* Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
(E)-4-(4-nitrophenyl)but-3-en-2-one (in DSMO)
C10H9NO3 *
DMSO

E Param.: -19.36

* J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
(E)-4-methyl-1-(4-nitrophenyl)pent-1-en-3-one (in DMSO)
C12H13NO3 *
DMSO

E Param.: -19.17

* J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m
(E)-4,4-dimethyl-1-(4-nitrophenyl)pent-1-en-3-one
C13H15NO3 *
DMSO

E Param.: -19.15

* J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m