G. Guirgis, H. V. Phan, J. Durig
Mar 1, 1992
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Influential Citations
4
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Journal
Journal of Molecular Structure
Abstract
Abstract The Raman spectra from 3600 to 10 cm−1 of liquid and solid 2-methyl-propionyl chloride (isobutyryl chloride), (CH3)2CHCClO, have been recorded. Additionally, qualitative depolarization ratios have been obtained from the Raman spectrum of the liquid. These data have been interpreted in that the gauche conformation is thermodynamically preferred over the higher energy trans conformation in the liquid and is the only rotamer present in the annealed solid. From the relative intensities of the Raman lines of the liquid at 687 cm−1 (gauche) and 563 cm−1 (trans) as a function of temperature, the enthalpy difference is determined to be 345 ± 93 cm−1 (987 ± 266 cal/mol). Vibrational assignments are proposed for the fundamentals based on depolarization values and group frequencies. The results are compared to the corresponding data for some similar molecules.