
%0 Journal Article
%A Fong, CW 
%A Grant, HG 
%T The interaction of dimethyl sulfoxide with N-benzoyl amino acids
%J Australian Journal of Chemistry
%D 1981/09/01
%V 34
%N 9
%P 1869-1874
%K 
%R https://doi.org/10.1071/CH9811869
%U https://www.publish.csiro.au/paper/CH9811869 
%X The interaction of dimethyl sulfoxide with N-benzoyl amino acids in deuterochloroform has been investigated by 13C n.m.r. spectroscopy. Examination of the chemical shifts of the benzene ring reveals that intermolecular hydrogen bonding between dimethyl sulfoxide and the amido-hydrogen atom increase the effective steric size of the amino hydrogen, resulting in an increase in the torsional angle between the benzene ring and the C(O)NHCH(R)COOH side chain. Self-association of N- benzoyl amino acids in deuterochloroform occurs largely through two COOH...O=C hydrogen bonds and does not involve intermolecular hydrogen bonding to the N-H proton. 
