Accession Number : AD0695854

Title :   EFFECT OF FUNCTIONAL GROUP CONFORMATION ON THE INFRARED SPECTRA OF SOME GEM DIFUNCTIONAL PHENYLETHYLENE DERIVATIVES,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT SUFFIELD RALSTON (ALBERTA)

Personal Author(s) : Currie,D. J. ; Lough,C. E. ; McClusky,F. K. ; Holmes,H. L.

Report Date : 21 FEB 1969

Pagination or Media Count : 7

Abstract : Except for the benzalmalononitriles, two functional group stretching vibrations occur in the infrared (i.r.) spectra of the beta,beta-difunctional-styrenes with similar functional groups. For geometrically homogeneous compounds with dissimilar functional groups only one absorption band occurs for each functional group. The two bands for similar functional groups have been ascribed to S-cis- and S-trans-conformations of the carbonyl groups with respect to the ethylene and variation in the frequencies of each of these oriented carbonyls to rotation of the functional group or groups out of the plane of the ethylene by steric factors. Frequencies for ethylenic C--H out of plane deformation bands for beta-monofunctional styrenes accorded with those already assigned to this vibration. A similar assignment could not be made for the difunctional analogues. (Author)

Descriptors :   (*STYRENES, *INFRARED SPECTRA), NITRILES, CARBOXYLIC ACIDS, KETONES, VIBRATION, CANADA

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE