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1J(CC) and 3J(CC) coupling constants in monosubstituted anilines. Additivity of substituent effects on carbon–carbon couplings

✍ Scribed by Péter Sándor; Lajos Radics

Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
691 KB
Volume
24
Category
Article
ISSN
0749-1581

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✦ Synopsis

Isotropic carbon-carbon couplig constants over one and three chemical bonds have been measured in ortho-, metaand para-substituted anilines, C,€€,NH,X (X = F, Cl, Br, I, OCH,, NH,, NO,, CN, COOCH,, CH,), in natural abundance. The experimental data are compared with J(CC) values calculated by assuming additivity of snbstituent coupling increments. Additivity conditions are discussed. Non-additivities are interpreted, on a qualitative level, in terms of mesomeric and inductive interactions between the substituents.

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