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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/2601

Title: CH Overtones in Acetophenone and Benzaldehyde: Aryl and Methyl Local Modes
Authors: Abdul Rasheed, T M
Moosad, K P B
Nampoori, V P N
Sathianandan, K
Technology
Keywords: Acetophenone
Benzaldehyde
Aryl and Methyl Local Modes
Issue Date: 1987
Publisher: American Chemical Society
Abstract: Vibrational overtone spectra of acetophenone and benzaldehyde in the visible and near-infrared regions are studied by the dual beam thermal lens and the conventional near-infrared absorption techniques. The observed increase in the mechanical frequency of the aryl CH bond from that of benzene is attributed to the decrease in the aryl CH bond length caused by the electron-withdrawing property of the substituents. Overtone spectra also demonstrate that acetophenone contains two types of methyl CH bonds arising from the anisotropic environments created by oxygen lone pair and carbonyl P electrons. The local-mode parameters of the two types of CH bonds are compared with those of acetone and acetaldehyde. The possible factors influencing the methyl CH bonds in acetophenone are discussed.
URI: http://dyuthi.cusat.ac.in/purl/2601
Appears in Collections:Dr. V P N Nampoori

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