Mayr's Database of Reactivity Parameters

Acceptor-Substituted Ethylenes

For reactivities of structurally related compounds go to: Electrophiles » C-Electrophiles » Acceptor-Substituted Ethylenes

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Name Solvent Reactivity
Parameters 		Classification Reference
(title or year)
ethyl 2-(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)acetate
C18H26O3 *

E Param.: -12.01

 *** Chem. Eur. J. 2025, 31, e202501224
10.1002/chem.202501224
2,6-di-tert-butyl-4-ethylidenecyclohexa-2,5-dien-1-one
C16H24O *

E Param.: -13.68

 *** Chem. Eur. J. 2025, 31, e202501224
10.1002/chem.202501224
4-benzylidene-2,6-di-tert-butylcyclohexa-2,5-dien-1-one
C21H26O *

E Param.: -15.58

 *** Chem. Eur. J. 2025, 31, e202501224
10.1002/chem.202501224
(E)-10-(4-methoxybenzylidene)phenanthren-9(10H)-one
C22H16O2 *

E Param.: -15.93

 *** J. Phys. Org. Chem. 2026, 39, e70061
10.1002/poc.70061
(E)-2-(4-methoxybenzylidene)acenaphthylen-1(2H)-one
C20H14O2 *

E Param.: -18.72

 *** J. Phys. Org. Chem. 2026, 39, e70061
10.1002/poc.70061
1,2-diaza-1,3-diene 1a
*
 DMSO

E Param.: -13.28

 *** Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
1,2-diaza-1,3-diene 1b
*
 DMSO

E Param.: -13.90

 *** Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
1,2-diaza-1,3-diene 1c
*
 DMSO

E Param.: -14.91

 *** Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
1,2-diaza-1,3-diene 1d
*
 DMSO

E Param.: -15.38

 *** Chem. Eur. J. 2010, 16, 12008-12016
10.1002/chem.201000828
(E)-3-(4-nitro-phenyl)-1-phenyl-prop-2-en-1-one (in DMSO)
*
 DMSO

E Param.: -17.33

 *** J. Am. Chem. Soc. 2011, 133, 8240-8251
10.1021/ja200820m