
%0 Journal Article
%A O'Conner, CJ 
%A Martin, RW 
%A Calvert, DJ 
%T Substituent effects on the N.M.R. spectra of carboxylic acid derivatives. II. <sup>3</sup>H N.M.R. spectra of substituted benzamides and N-alkylbenzamides
%J Australian Journal of Chemistry
%D 1981/11/01
%V 34
%N 11
%P 2297-2305
%K 
%R https://doi.org/10.1071/CH9812297
%U https://www.publish.csiro.au/paper/CH9812297 
%X The tritium n.m.r. spectra of 12 substituted benzamides and five series of N-alkylbenzamides have been measured, after tritiation of the amides, and the chemical shifts, &#948;N3H, have been compared with &#948;NH. The values correlate well when &#963;R(BA) is substituted in the Taft DSP equation. Good correlations are also obtained with the Hammett &#963; parameter. The non-equivalence of the two amido protons of benzamides, arising from the barrier to rotation round the carbon-nitrogen bond, has been confirmed by use of triton n.m.r. spectroscopy. 
