Mayr's Database of Reactivity Parameters

Carbocations

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Name Solvent Reactivity
Parameters
Classification Reference
(title or year)
(3-Cl)-tritylium ion
*

E Param.: 1.06

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(3-F)-tritylium ion
*

E Param.: 1.01

* Eur. J. Org. Chem. 2011, , 6470-6475
10.1002/ejoc.201100910
1,1,3-triphenylallylium ion
C21H17 *

E Param.: 0.98, Deviation: ±0.20

*** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
9-(4-methoxyphenyl)-9H-fluoren-9-ylium
C20H27O *
dichloromethane

E Param.: 0.85

*** Chem. Eur. J. 2017, 23, 623-630
10.1002/chem.201603963
ani(pop)CH+
C20H17O2 *

E Param.: 0.61

***** J. Am. Chem. Soc. 2001, 123, 9500-9512
10.1021/ja010890y
tritylium ion (Ph3C+)
C19H15 *

E Param.: 0.51

- J. Am. Chem. Soc. 2003, 125, 286-295
10.1021/ja021010y
(4-F)-tritylium ion
*

E Param.: 0.35

* Eur. J. Org. Chem. 2011, , 6470-6475
10.1002/ejoc.201100910
(4-F)2-tritylium ion
*

E Param.: 0.17

* Eur. J. Org. Chem. 2011, , 6470-6475
10.1002/ejoc.201100910
methoxy-(4-methoxyphenyl)methylium ion
C9H11O2 *

E Param.: 0.14, Deviation: ±0.01

*** Acc. Chem. Res. 2003, 36, 66-77
10.1021/ar020094c
(4-F)3-tritylium ion
*

E Param.: 0.05

* Eur. J. Org. Chem. 2011, , 6470-6475
10.1002/ejoc.201100910