Accession Number:

AD0815812

Title:

SPECTROSCOPIC STUDIES OF SATURATED ALIPHATIC NITRILES IN THE 15-40 MICRON REGION.

Descriptive Note:

Technical rept. Sep 65-31 Dec 66,

Corporate Author:

DAYTON UNIV OH RESEARCH INST

Personal Author(s):

Report Date:

1967-04-01

Pagination or Media Count:

52.0

Abstract:

The infrared spectra of a number of normal and branched-chain aliphatic mononitriles have been recorded and studied in the range 667-250 cm-1. The discussion is focused on the C-CN out-of-plane and the C-C-C angle bending vibrations. Assignments of C-C-C bending frequencies to particular configurations of a molecule are made on the basic of band intensities, low-temperature spectra, and steric factors involved. Mizushimas system of nomenclature for conformational isomers is found useful. The relative stability of the trans and gauche isomers of butanenitrile, 3-chloropropanenitrile, 3-bromopropanenitrile, and 3-iodopropanenitrile is studied in the gaseous, liquid, and solid states by infrared spectroscopy. Some values of the energy difference between rotational isomers have been calculated. The trans is found to be more stable for butanenitrile and 3-iodopropanenitrile in all phases. The gauche forms of 3-chloropropanenitrile and 3-bromopropanenitrile are of lower energy than the corresponding trans isomers, but the reverse is true in the vapor state. Author

Subject Categories:

  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE