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Vicinal 13 CH coupling through olefinic double bonds
Author(s) -
Douglas Alan W.
Publication year - 1977
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270090204
Subject(s) - vicinal , substituent , steric effects , double bond , polarity (international relations) , chemistry , coupling (piping) , crystallography , stereochemistry , materials science , polymer chemistry , organic chemistry , biochemistry , metallurgy , cell
Values of long range 13 CH coupling through the double bond in a number of isopropenyl compounds are reported. There is evidence that substituent dependence of 3 J (CH) is not related linearly to that of HH couplings in vinyl compounds. The ratio of 3 J (CH) to 3 J (HH) in analogous pairs of compounds appears to increase with decreasing substituent polarity and increasing steric bulk.