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KMID : 1059519930370120987
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Journal of the Korean Chemical Society
1993 Volume.37 No. 12 p.987 ~ p.994
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Solvent Effects upon Carbonyl Stretching Freguency Shifts of Raman Spectra : Ketones
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Lee In-Ju
Seo Seong-Hun
Lee Mu-Sang
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Abstract
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Inductive and resonance effects play an important role in determining carbony) stretching frequencies of ketones. Hydrogen bonding, dielectric effects, and steric effects are all factors which determine the carbonyl stretching frequency, νC=O of ketones in solution. The νC=O frequencies were shifted by approximately 27cm-1 each by substituting to a phenyl group for a methyl group in acetone. The νC=O frequency for ketones shifted differently in various solvents and increased with increasing the volume ratio of the ketones in water solutions. The νC=O frequency for ketones shifts continously at constant concentration of ketone in solutions of (CH3)2SO / CCl4 and CHCl3 / CCl4 with changing of the mole ratio of two solvents. The νC=O frequency was also affected by changing concentration in either CCl4 or (CH3)2SO solution and in either CCl4 or CHCl3 solution.
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