
%0 Journal Article
%A Le Fevre, JW 
%A O'Dwyer, MF 
%A Werner, RL 
%T Infra-red spectra of compunds containing the Azo-group
%J Australian Journal of Chemistry
%D 1953/12/01
%V 6
%N 4
%P 341-359
%K 
%R https://doi.org/10.1071/CH9530341
%U https://www.publish.csiro.au/paper/CH9530341 
%X Infra-red absorption spectra, over the rock-salt region, are reported for 43 substances believed to contain the -N=N- group. In the &quot; double bond &quot; region two common frequencies are noted, at 1406 and 1579 cm-1 (with standard deviations of ±14 and ± 9 cm-1 respectively). Since these may arise wholly or partly from vibrations of the aromatic or heterocyclic nuclei adjacent to the azo-linkages, the conclusion is drawn that N=N stretching modes, if active in absorption, are contributors to either or both of the bands at the points mentioned. 
