Mayr's Database of Reactivity Parameters

Carbocations

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Name Solvent Reactivity
Parameters
Classification Reference
(title or year)
dibenzo[a,d]tropylium ion
C15H11*
dichloromethane

E Param.: -0.63

-Liebigs Ann. 1995, , 2005-2009
10.1002/jlac.1995199[...]
dimethylmethyleneammonium ion
C3H8N*

E Param.: -6.69

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

E Param.: 2.70

***J. Org. Chem. 2011, 76, 9391-9408
10.1021/jo201668w
flavylium ion
C15H11O*

E Param.: -3.45

***Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
indolecarboxylate derived iminium ion
*
dichloromethane

E Param.: -9.50

**Angew. Chem. Int. Ed. 2009, 48, 5034-5037
10.1002/anie.200900933
Jorgensen/Hayashi-iminium ion
C29H34NOSi+*

E Param.: -8.20

***Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
MacMillan-iminium ion (1st generation)
C22H25N2O+*
MeCN

E Param.: -7.37

***Angew. Chem. Int. Ed. 2011, 50, 9953-9956
10.1002/anie.201103683
MacMillan-iminium ion (2nd generation)
*
MeCN

E Param.: -5.52

***Angew. Chem. Int. Ed. 2011, 50, 9953-9956
10.1002/anie.201103683
MacMillan-iminium ion (spiro)
*
MeCN

E Param.: -7.67

***Angew. Chem. Int. Ed. 2011, 50, 9953-9956
10.1002/anie.201103683
Me2N+=CH-CH-Ph
C11H14N+*

E Param.: -9.20

***Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
methoxy-(4-methoxyphenyl)methylium ion
C9H11O2*

E Param.: 0.14

***Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
methoxy-(4-methylphenyl)methylium ion
C9H11O*

E Param.: 1.90

***Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
methoxy-phenylmethylium ion
C8H9O*

E Param.: 2.97

***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
mor iminium
C13H16NO+*

E Param.: -8.60

***Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
N-ethylidenecarbazolium ion
C14H12N*

E Param.: 2.41

***Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
N-methylacridinium ion
C14H12N*

E Param.: -7.15

***Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
p-AniCH=N+Me2 (in MeCN)
C10H14NO*
MeCN

E Param.: -10.69

***J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
p-CF3-C6H4-CH=N+Me2 (in MeCN)
C10H11F3N*
MeCN

E Param.: -8.34

***J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
pfp(Ph)CH+
C13H10F*

E Param.: 5.20

*****J. Am. Chem. Soc. 2012, 134, 13902-13911
10.1021/ja306522b
PhCH=N+(CH2)4 (in MeCN)
C11H14N*
MeCN

E Param.: -9.35

***J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
PhCH=N+(CH2)5 (in MeCN)
C12H16N*
MeCN

E Param.: -9.60

***J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
PhCH=N+Me2 (in MeCN)
C9H12N*
MeCN

E Param.: -9.27

***J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
pipN+=CH-CH-Ph
C14H18N+*

E Param.: -10.30

*Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
pop(Ph)CH+
C19H15O*

E Param.: 2.90

*****J. Am. Chem. Soc. 2001, 123, 9500-9512
10.1021/ja010890y
pop(tol)CH+
C20H17O*

E Param.: 2.16

***Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
pTolCH=N+CH2 (in MeCN)
C10H14N*
MeCN

E Param.: -9.64

***J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
pyrN+=CH-CH-Ph
C13H16N+*

E Param.: -9.80

***Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
tol(Ph)CH+
C14H13*

E Param.: 4.43

*****J. Am. Chem. Soc. 2012, 134, 13902-13911
10.1021/ja306522b
tritylium ion (Ph3C+)
C19H15*

E Param.: 0.51

-J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
tropylium ion
C7H7*

E Param.: -3.72

***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