Mayr's Database of Reactivity Parameters

Carbocations

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Name Solvent Reactivity
Parameters
Classification Reference
(title or year)
Vilsmeier ion
C3H7ClN *

E Param.: -5.77

* Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
tropylium ion
C7H7 *

E Param.: -3.72, Deviation: ±0.03

*** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
tritylium ion (Ph3C+)
C19H15 *

E Param.: 0.51

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
tol(Ph)CH+
C14H13 *

E Param.: 4.43

***** J. Am. Chem. Soc. 2012, 134, 13902-13911
10.1021/ja306522b
pyrN+=CH-CH-Ph
C13H16N+ *

E Param.: -9.80

*** Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
pTolCH=N+CH2 (in MeCN)
C10H14N *
MeCN

E Param.: -9.64

*** J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x
pop(tol)CH+
C20H17O *

E Param.: 2.16, Deviation: ±0.03

*** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
pop(Ph)CH+
C19H15O *

E Param.: 2.90

***** J. Am. Chem. Soc. 2001, 123, 9500-9512
10.1021/ja010890y
pipN+=CH-CH-Ph
C14H18N+ *

E Param.: -10.30

* Angew. Chem. Int. Ed. 2008, 47, 8723-8726
10.1002/anie.200802889
PhCH=N+Me2 (in MeCN)
C9H12N *
MeCN

E Param.: -9.27

*** J. Am. Chem. Soc. 2013, 135, 6579-6587
10.1021/ja401106x