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Overtone absorption spectra of gaseous amines: CH3NH2, (CH3)2NH, Et2NH, and N2H4. Conformationally non-equivalent CH and NH local mode oscillators

✍ Scribed by Howard L. Fang; Robert L. Swofford; David A.C. Compton

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 578 KB
Volume: 108
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(84)85050-2

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✦ Synopsis

Overtone absorption spectra arc reported for gas-phase methylamine, dimcthylamine, diethylamine. and hydrazine as measured by intracavity photoacoustic and IT iR spectroscopy. Prominent features in the spectra are assigned as N-H and C-H stretching overtones within rhe local mode model of loosely coupled, anharmonic vibrations. In diethylamine, C-H overtone bands arising from more than one conformation arc observed. In dhncthylamine, C-H strctchinp frequencies are observed that correspond to the methyl C-H bond trans to the other methyl, trans lo the hydrogen, or trans to rhe electron lone pair on nitrogen. The N-H overtones in hydra&e also show distinct bands arising from conformationally non-equivalent oscillators.

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