Localized Normal Coordinates in Accurate Vibrational Structure Calculations: Benchmarks for Small Molecules.

Localized Normal Coordinates in Accurate Vibrational Structure Calculations: Benchmarks for Small Molecules.
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精确振动结构计算中的局部法向坐标:小分子的基准

DOI:
10.1021/acs.jctc.9b00381
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发表时间:
2019
影响因子:
5.5
通讯作者:
G. Rauhut
G. Rauhut
中科院分区:
化学1区
文献类型:
--
作者:
B. Ziegler;G. Rauhut

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研究了定域CH伸缩简正坐标与正则简正坐标对精确计算分子振动结构性能的影响。详细考虑了两个方面:(A)多维势能面模展开式中耦合项的(预先)筛选和(B)振动组态相互作用计算(VCI)的要求。所有的计算都是在现实的设置中进行的,任何近似的效果都是通过最终VCI频率的偏差来测量的,这允许与实验数据进行直接比较。
The impact of localized CH-stretching normal coordinates in comparison to canonical normal coordinates on the performance of accurate vibrational structure calculations has been studied for simple molecules of up to eight atoms. Two aspects have been considered in detail, (a) the (pre)screening of coupling terms within ann-mode expansion of the multidimensional potential energy surface and (b) the demands in vibrational configuration interaction calculations (VCI). All calculations have been performed in a realistic setup, and the effect of any approximation has been measured in deviations of the final VCI frequencies, which allows for a direct comparison with experimental data.
勘误表:“走向大规模振动构型相互作用计算”[J. Phys. 131, 124129 (2009)]
DOI: 10.1063/1.3273188
发表时间: 2009
影响因子: 4.4
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发表时间: 2009-05-07
影响因子: 3.3
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使用局部模式来描述高度振动激发的分子
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发表时间: 1977
影响因子: 18.3
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