Vibrational energy levels of methyl chloride calculated from full dimensional ab initio potential energy surface

被引:22
|
作者
Nikitin, Andrei Vladimirovich [1 ]
机构
[1] Russian Acad Sci, Inst Atmospher Opt, Lab Theoret Spect, Tomsk 634055, Russia
关键词
Methyl chloride; Vibrational Energy levels; Isotopic species; Ab initio potential energy surface;
D O I
10.1016/j.jms.2008.06.001
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
The vibrational levels for two isotopic species of methyl chloride have been calculated in the region 03500 cm(-1) from the ab initio potential energy surface (PES). The isotopic shift of vibrational levels of molecules (CH3Cl)-C-12-Cl-35 and (CH3Cl)-C-12-Cl-37 has been calculated. The correlation consistent basis sets cc-pVTZ and cc-pVQZ are employed to calculate energy values for 7957 and 3758 points correspondingly from a large domain of the nine-dimensional internal coordinate space. The analytic global PES is fitted with the standard deviation of 4.5 cm(-1). (C) 2008 Elsevier Inc. All rights reserved.
引用
收藏
页码:17 / 21
页数:5
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