THE POLARIZED INFRARED SPECTRUM OF CRYSTALLINE ACETONE
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Date
1974
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Ohio State University
Abstract
Through the use of oriented polycrystals the polarized infrared spectrum of crystalline acetone has been investigated. This technique has allowed observation of many previously unreported bands. Most of these may be assisted readily as factor group components. Approximate dichroic ratios have been calculated for a number of well isolated bands. These, together with the oriented gas model, have been used to assign three low frequency modes over which much controversy has arisen in the past. The assignment based on the qualitative infrared dichroic ratios agrees with that derived from the laser-Raman depolarization ratios (J. R. Allkins and E. R. Lippincott, Spectrochim. Acta 25A, 761 (1969). In addition, the solid state spectrum has allowed prediction of a site group symmetry, and from this, coupled with the infrared polarization properties, determination of an appropriate crystal system has been made.
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Author Institution: Department of Chemistry, Miami University