
%0 Journal Article
%A Guy, RW 
%A Jones, RA 
%T Pyrrole studies. VIII. The NH stretching frequencies of substituted pyrroles Acetyl and benzoyl substituents
%J Australian Journal of Chemistry
%D 1966/01/01
%V 19
%N 1
%P 107-113
%K 
%R https://doi.org/10.1071/CH9660107
%U https://www.publish.csiro.au/paper/CH9660107 
%X The infrared spectra of a number of acylpyrroles have been examined in the NH and CO stretching region under high resolution in carbon tetrachloride. Analysis of the data show-s that the effect of each group on the NH stretching frequency is independent of other substituents and additive. Pyrroles having the acyl substituent in the &#946;-position show two concentration-independent bands. The lower frequency band arises from interaction with the out-of-plane deformation of the NH group, producing a hot band. 
