
%0 Journal Article
%A Rae, ID 
%T Aromatic amides. XI. 1,3-Phenylenediamines and their diacyl derivatives
%J Australian Journal of Chemistry
%D 1978/08/01
%V 31
%N 8
%P 1851-1854
%K 
%R https://doi.org/10.1071/CH9781851
%U https://www.publish.csiro.au/paper/CH9781851 
%X In 4,6-disubstituted N,N'-(1,3-phenylene)bispivalamides, the ring hydrogen between the two amide groups is deshielded by both and consequently shows its 1H nuclear magnetic resonance at extremely low field. Preferential stabilization of a particular amide configuration by dipole-dipole interactions gives rise to differential shielding effects in N,N'-(4-chloro-1,3-phenylene)bispivalamide and to strong deshielding of the aromatic C5-H in N,N'-(2-methylthiopyrimidine-4,6-diyl)bispivalamide. 
