Towards the understanding of the spectroscopic behaviour of the C-H oscillator in C-H•••O hydrogen bonds:: the effect of solvent polarity

被引:30
作者
Ribeiro-Claro, PJA [1 ]
Vaz, PD [1 ]
机构
[1] Univ Aveiro, Dept Quim, CICECO, P-3810193 Aveiro, Portugal
关键词
D O I
10.1016/j.cplett.2004.04.041
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The effect of solvent polarity versus specific C-(HO)-O-... contacts on the vibrational vC-H mode is studied using CHCl3 as a model system. Ab initio SCI-PCM calculations show that the overall shift of the vC-H band, sometimes ascribed to the C-(HO)-O-... hydrogen bonding, can in fact be explained by the electrostatic interaction with a dielectric environment. The presence of a new X-H band assigned to the C-(HO)-O-... bonded forms - remains as the most reliable evidence of C-(HO)-O-... hydrogen bonding. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:358 / 361
页数:4
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