Mayr's Database of Reactivity Parameters

Carbocations

For reactivities of structurally related compounds go to: Electrophiles » C-Electrophiles » Carbocations

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Name Solvent Reactivity
Parameters 		Classification Reference
(title or year)
(S,E)-5-benzyl-2,2,3-trimethyl-1-((E)-3-(3-nitrophenyl)allylidene)-4-oxoimidazolidin-1-ium
C22H24N3O3 *
 dichloromethane

E Param.: -6.10

 ** Asian J. Org. Chem. 2014, 3, 550-555
10.1002/ajoc.201402009
(S,E)-2,2,3-trimethyl-4-oxo-5-((perfluorophenyl)methyl)-1-((E)-3-phenylallylidene)imidazolidin-1-ium
C22H20F5N2O *
 dichloromethane

E Param.: -6.00

 ** Angew. Chem. Int. Ed. 2013, 52, 7967-7971
10.1002/anie.201301864
(S,E)-5-benzyl-1-((E)-3-(4-cyanophenyl)allylidene)-2,2,3-trimethyl-4-oxoimidazolidin-1-ium
C23H24N3O *
 dichloromethane

E Param.: -6.00

 ** Asian J. Org. Chem. 2014, 3, 550-555
10.1002/ajoc.201402009
bis(1-methylindol-3-yl)methylium ion
C19H17N2 *

E Param.: -5.99

 *** J. Org. Chem. 2015, 80, 8643-8656
10.1021/acs.joc.5b01298
2-phenyl-1,3-dithiolan-2-ylium ion
C9H9S2 *

E Param.: -5.91, Deviation: ±0.33

 *** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
(S,E)-5-benzyl-2,2,3-trimethyl-1-((E)-3-(4-nitrophenyl)allylidene)-4-oxoimidazolidin-1-ium
C22H24N3O3 *
 dichloromethane

E Param.: -5.90

 ** Asian J. Org. Chem. 2014, 3, 550-555
10.1002/ajoc.201402009
(2S,5S)-5-benzyl-3-methyl-4-oxo-1-(3-phenylallylidene)-2-((E)-styryl)imidazolidin-1-ium
C28H27N2O *
 dichloromethane

E Param.: -5.90

 ** Asian J. Org. Chem. 2014, 3, 550-555
10.1002/ajoc.201402009
(mpa)2CH+
C27H25N2 *

E Param.: -5.89

 ***** J. Am. Chem. Soc. 2001, 123, 9500-9512
10.1021/ja010890y
Vilsmeier ion
C3H7ClN *

E Param.: -5.77

 * Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
(mor)2CH+
C21H25N2O2 *

E Param.: -5.53

 ***** J. Am. Chem. Soc. 2001, 123, 9500-9512
10.1021/ja010890y