
%0 Journal Article
%A Caddy, B 
%A Martin-Smith, M 
%A Norris, RK 
%A Reid, ST 
%A Sternhell, S 
%T Proton magnetic resonance spectra of some benzo[b]thiophens. An investigation of substituent effects in a heteroaromatic system
%J Australian Journal of Chemistry
%D 1968/07/01
%V 21
%N 7
%P 1853-1866
%K 
%R https://doi.org/10.1071/CH9681853
%U https://www.publish.csiro.au/paper/CH9681853 
%X N.m.r. data for 19 5-substituted and 13 polysubstituted benzo[b]thiophens are tabulated. The influence of the substituents at C5 on the chemical shifts of H4 and H6 is discussed. Long-range interproton spin-spin coupling between H3 and H7, and between H2 and H6, is general in benzo[b]thiophens. The vicinal coupling J6,7 in 5-substituted benzo[b]thiophens varies directly and linearly with the electronegativity of the substituents at C5. 
