DENSITY AND TEMPERATURE STUDY OF THE RAMAN NON-COINCIDENCE EFFECT IN ALKYL BENZOATES
Date
1997
Authors
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Publisher
Ohio State University
Abstract
The non-coincidence $(\Delta \nu)$ of the isotropic and anisotropic peak frequencies of the Raman carbonyl band was studied for a series of alkyl benzoates. Methyl benzoate, ethyl benzoate, propyl benzoate hexyl benzoate and 2-ethylthexyl benzoate were observed over a density range of 0-95 to 1.20 g $cm^{-3}$ at 20 and $40^\circ C$. The characteristic density dependence of the value of the non-coincidence effect for each alkyl benozate correlates well with the length and branching of the alkyl side chain. In fact, it was possible to interpret the density dependence of $\Delta \nu$ in terms of packing fraction and conformational changes of the alkyl side chain.
Description
Author Institution: Department of Chemistry, School of Chemical Sciences, and Beckman Institute for Advanced Science and Technology, University of Illinois