Mayr's Database of Reactivity Parameters

Carbocations

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Name Solvent Reactivity
Parameters
Classification Reference
(title or year)
methoxy-phenylmethylium ion
C8H9O *

E Param.: 2.97, Deviation: ±0.09

*** 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
1-phenylcyclopent-2-enylium ion
C11H11 *

E Param.: 2.89, Deviation: ±0.25

*** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
diarylallylium ion (4-Br)2
*

E Param.: 2.85

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

E Param.: 2.70

*** J. Org. Chem. 2011, 76, 9391-9408
10.1021/jo201668w
diarylallylium ion (4-Cl)2
*

E Param.: 2.69

* J. Org. Chem. 2011, 76, 9391-9408
10.1021/jo201668w
(3-F)4-tritylium ion
*

E Param.: 2.54

* Eur. J. Org. Chem. 2011, , 6470-6475
10.1002/ejoc.201100910
N-ethylidenecarbazolium ion
C14H12N *

E Param.: 2.41, Deviation: ±0.33

*** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
9-phenyl-9H-fluoren-9-ylium
C19H25 *
dichloromethane

E Param.: 2.41

*** Chem. Eur. J. 2017, 23, 623-630
10.1002/chem.201603963
(4-CF3)2-tritylium ion
*

E Param.: 2.28

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