Mayr's Database of Reactivity Parameters

Carbocations

For reactivities of structurally related compounds go to: Electrophiles » C-Electrophiles
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Name Solvent Reactivity
Parameters 		Classification Reference
(title or year)
(4-NMe2)3-tritylium ion (= Crystal violet)
*

E Param.: -11.26

-J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
p-AniCH=N+Me2 (in MeCN)
C10H14NO*
 MeCN

E Param.: -10.69

***J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
(S,E)-5-benzyl-1-((E)-3-(4-(dimethylamino)phenyl)allylidene)-2,2,3-trimethyl-4-oxoimidazolidin-1-ium
C24H30N3O*
 dichloromethane

E Param.: -10.60

**Asian J. Org. Chem. 2014, 3, 550-555
10.1002/ajoc.201402009
pipN+=CH-CH-Ph
C14H18N+*

E Param.: -10.30

*Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
(4-NMe2)2-tritylium ion (= Malachite green)
*

E Param.: -10.29

-J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
bis(1,2-dimethylindol-3-yl)methylium ion
C21H21N2*

E Param.: -10.23

***J. Org. Chem. 2015, 80, 8643-8656
10.1021/acs.joc.5b01298
(lil)2CH+
C23H25N2*

E Param.: -10.04

*****J. Am. Chem. Soc. 2001, 123, 9500-9512
10.1021/ja010890y
1,1,3-tris(4-(dimethylamino)phenyl)allylium ion
C27H32N3*

E Param.: -9.84

***Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
pyrN+=CH-CH-Ph
C13H16N+*

E Param.: -9.80

***Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
bis(julidin-9-yl)allylium ion
*

E Param.: -9.78

***J. Org. Chem. 2011, 76, 9391-9408
10.1021/jo201668w