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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Ab initio and DFT studies on vibrational spectra of some mixed carbonyl-halide complexes of ruthenium(II)
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Ab initio and DFT studies on vibrational spectra of some mixed carbonyl-halide complexes of ruthenium(II)

机译:从头开始和DFT研究钌(II)混合羰基卤化物配合物的振动光谱

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摘要

The vibrational spectra of Ru(CO)(6)(2+) and some of its mixed carbonyl-halide complexes, cis-Ru(CO)(2)X-4(2-), fac-Ru(CO)(3)X-3(-) and Ru(CO)(5)X+ (X = F, Cl, Br and I), have been systematically investigated by ab initio RHF and density functional B3LYP methods with LanL2DZ and SDD basis sets. The calculated vibrational frequencies of complexes Ru(CO)(6)(2+), cis-Ru(CO)(2)X-4(2-) and fac-Ru(CO)(3)X-3(-) are evaluated via comparison with the experimental values. In the infrared frequency region, the C-O stretching vibrational frequencies calculated at B3LYP level with two basis sets are in good agreement with the observed values with deviations less than 5%. In the far-infrared region, the B3LYP/SDD method achieved the best results with deviations less than 8% for Ru-X stretching and less than 2% for Ru-C stretching vibrational frequencies. The vibrational frequencies for RU(CO)(5)X+ that have not been experimentally reported were predicted. (C) 2004 Elsevier B.V. All rights reserved.
机译:Ru(CO)(6)(2+)及其混合的羰基卤化物配合物cis-Ru(CO)(2)X-4(2-),fac-Ru(CO)(3)的振动光谱X-3(-)和Ru(CO)(5)X +(X = F,Cl,Br和I)已通过从头算RHF和具有LanL2DZ和SDD基集的密度泛函B3LYP方法进行了系统研究。配合物Ru(CO)(6)(2 +),cis-Ru(CO)(2)X-4(2-)和fac-Ru(CO)(3)X-3(-)的计算振动频率通过与实验值比较来评估。在红外频率范围内,在B3LYP水平下使用两个基集计算出的C-O拉伸振动频率与偏差小于5%的观测值非常吻合。在远红外区域,B3LYP / SDD方法获得了最佳结果,Ru-X拉伸的偏差小于8%,Ru-C拉伸的振动频率偏差小于2%。 RU(CO)(5)X +的振动频率尚未进行实验预测。 (C)2004 Elsevier B.V.保留所有权利。

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