
TY  - JOUR
A1  - Rottendorf, H 
A1  - Sternhell, S 
A1  - Wilmshurst, JR 
T1  - 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
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1965
VL  - 18
IS  - 11
SP  - 1759
EP  - 1773
KW  - 
UR  - https://doi.org/10.1071/CH9651759 
N2  - 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. 
ER  -

