VIBRATIONAL SPECTRA AND CONFORMATIONS OF CYCLOHEXYLPHOSPHINE AND 2-CYANOETHYLPHOSPHINE
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Date
1986
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Ohio State University
Abstract
Infrared spectra of gaseous and solid cyclohexylphosphine and Raman spectra of the condensed phases of this compound have been recorded. Data for the most stable conformer are consistent with the microwave results which indicate the existence of a gaucheequatorial chair form. Additional conformations whose very weak lines in the room-temperature Raman spectrum are absent in the solid state have been observed and are at least 900 cal/mole less stable. The possible identities of these conformers will be discussed. Infrared and Raman spectra have likewise been recorded for 2-cyanoethylphosphine. There are two bonds about which internal rotation can give rise to conformers, and at least two, separated by approximately 300 cal/mole, have been observed. The number of depolarized lines in the Raman spectrum tentatively suggests that one of these is the $C_{s}$ conformer (Tt). The identities of the conformers will be discussed.
Description
$^{1}$ Y. S. Li, $40^{th}$ Symposium on Molecular Spectroscopy, Ohio State University, June 17-21, 1985, paper TG5. Address of Kalasinsky and Pai: Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762.
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