Abstract
The epoxy ring breathing mode and epoxy asymmetric deformation increase in frequency while the epoxy symmetric deformation for styrene oxide decreases in frequency as the mole% CHCl 3/CCl 4 or CDCl 3/CCl 4 increases. The ν(CH), ν(CC) and ν 24 ( b 1) modes for phenylacetylene decrease in frequency while the δ ip(CH), γ op(CH), ν 32 ( b 2) and ν 34 ( b 2) modes increase in frequency for phenylacetylene as the mole% CHCl 3/CCl 4 increases. The modes associated with the acetylenic group change more in frequency with change in the solvent than do the phenyl ring modes. There is a linear relationship between the change in the δ ip(CH) and γ op(CH) frequencies for phenylacetylene with change in the solvent system. The changes in the epoxy group frequencies and the acetylenic group frequencies with change in the solvent system indicate that these functional groups form complexes with the solvent system. Intermolecular hydrogen bonded complexes and dipolar effects are given as the major factors in affecting the discussed group frequency changes with changes in the solvent system.
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