Mayr's Database of Reactivity Parameters

Carbocations

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Name Solvent Reactivity
Parameters
Classification Reference
(title or year)
3-benzylidene-1-methyl-3H-indol-1-ium ion
C16H14N *

E Param.: -1.80

*** J. Org. Chem. 2015, 80, 8643-8656
10.1021/acs.joc.5b01298
(4-OMe,3-Me)-tritylium ion
*

E Param.: -1.84

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
Ph2C=C=N(+)Me2
*

E Param.: -1.90

- Synthesis 2025, 57, 3251-3262
10.1055/a-2649-1999
(4-MeO,4-Me)-tritylium ion
*

E Param.: -2.13

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
1,3-dithianylium ion
C4H7S2 *

E Param.: -2.14, Deviation: ±0.07

*** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
1-methyl-3-(4-methylbenzylidene)-3H-indol-1-ium ion
C17H16N *

E Param.: -2.19

*** J. Org. Chem. 2015, 80, 8643-8656
10.1021/acs.joc.5b01298
1,1-dianisyl-3-phenylallylium ion
C23H21O2 *

E Param.: -2.67, Deviation: ±0.30

*** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
Me2C=C=N(+)Me2
*

E Param.: -2.80

- Synthesis 2025, 57, 3251-3262
10.1055/a-2649-1999
3-(4-methoxybenzylidene)-1-methyl-3H-indol-1-ium iom
C17H16NO *

E Param.: -3.02

*** J. Org. Chem. 2015, 80, 8643-8656
10.1021/acs.joc.5b01298
(4-MeO)2-tritylium ion
*

E Param.: -3.04

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y