
%0 Journal Article
%A Rottendorf, H 
%A Sternhell, S 
%A Wilmshurst, JR 
%T Proton magnetic resonance spectra of some &#946;-methylstyrenes, &#946;,&#946;-dimethylstyrenes, and &#945;-methylstilbenes; and a discussion of long-range shieldingand coupling effects in these and related systems
%J Australian Journal of Chemistry
%D 1965/11/01
%V 18
%N 11
%P 1759-1773
%K 
%R https://doi.org/10.1071/CH9651759
%U https://www.publish.csiro.au/paper/CH9651759 
%X The preparation of some new &#946;,&#946;-dimethylstyrenes and &#945;-methylstilbenes is described and their p.m.r. spectra are reported. The long-range shielding effects in &#946;,&#946;-dimethylstyrenes and other styrene derivatives are discussed. The differences between the cisoid and transoid allylic coupling constants in &#946;,&#946;-dimethylstyrenes are much smaller than the corresponding differences in simple propenes. No appreciable (J &#8805; 0.3 c/s) coupling between the non-equivalent methyl protons in &#946;,&#946;-dimethylstyrenes has been observed. Long-range coupling in the compounds investigated appears to be independent of ring substitution. Some general features of allylic coupling are discussed. 
