Infra-red spectral studies of CHF2-CHCl2 and CBrCl2-CBrCl

Kartha, V. B. ; Kartha, Santha B. ; Narasimham, N. A. (1967) Infra-red spectral studies of CHF2-CHCl2 and CBrCl2-CBrCl Proceedings of the Indian Academy of Sciences, Section A, 65 (1). pp. 1-18. ISSN 0370-0089

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The infra-red spectra of two polyhalogenated ethanes, 1, 1-difluoro-2, 2-dichloro ethane and 1, 2-dibromo-1, 1, 2, 2-tetrachloro ethane were obtained in the region of 2.5-38 microns. The spectra of CHF2-CHCl2 were obtained in gas, liquid and solid states and also in solvents of widely varying dielectric constants. These spectral studies showed that the molecule exists in the form of two rotational isomers. The fundamental modes of the two isomers were identified on the basis of intensity changes from gas to liquid to solid and in solvents of different dielectric constants. The observed infra-red absorption bands have been assigned in terms of the fundamental absorption bands. Spectra of CBrCl2-CBrCl2 were obtained in the solid and vapour phase and in various solvents. These spectra showed that CBrCl2-CBrCl2 exists only in the trans form. The infra-red spectra, combined with Raman data available from literature was used for complete assignment of the observed absorption bands.

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Source:Copyright of this article belongs to Indian Academy of Sciences.
ID Code:17888
Deposited On:16 Nov 2010 12:54
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