
%0 Journal Article
%A Fong, CW 
%T Electronic effects of halogen-substituted methyl groups
%J Australian Journal of Chemistry
%D 1980/06/01
%V 33
%N 6
%P 1291-1300
%K 
%R https://doi.org/10.1071/CH9801291
%U https://www.publish.csiro.au/paper/CH9801291 
%X The electronic effects of the halogen-substituted methyl groups, CHnX3-n, where X is F, Cl, Br or I, have been examined by 13C n.m.r, spectroscopy in a series of &#945;-halogen-substituted toluenes. The substituent chemical shifts of all carbon atoms, as well as the &#963;I and &#963;R0 substituent parameters derived from a dual substituent parameter (DSP) analysis, are examined in terms of hyperconjugative and &#960;-inductive substituent effects. Bulky CHnX3-n substituents cause molecular deformations of the benzene ring, consequently invalidating the derivation of substituent parameters from a DSP analysis. 
