VIBRATIONAL SPECTRA AND NORMAL COORDINATE ANALYSIS OF ISOTOPICALLY LABELLED FORMIC ACID MONOMERS
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Date
1976
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Ohio State University
Abstract
Infrared spectra are reported for 24 isotopically labelled (D, $^{13}C$, $^{18}O)$ formic acid monomers isolated in a neon matrix. Clear isotope effects are observed for most of the fundamental vibrations. Using 156 observed frequency values (no DC- stretches) all 28 force constants of the $a^{\prime}$ symmetry block are retained and estimated. The normal coordinates frequently show appreciable mixing of the symmetry coordinates, e.g. the C-0 stretch and the COH angle deformation. Two clear Fermi resonance are found that shift fundamental frequencies of DCOOD species. These are the carbonyl stretch and the skeletal mode located near $1030 cm^{-1}$.
Description
Present address of Duane R, Kirklin: National Bureau of Standards, Washington, D. C., 20234. Ellis R, Lippincott: Posthumous.
Author Institution: Department of Chemistry, Texas Technological University
Author Institution: Department of Chemistry, Texas Technological University