首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Charge-Transfer CVomplexes between NH_3 and the Halogens F_2, CIF, and Cl_2: An ab Initio Study on the Intermolecular Interaction
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Charge-Transfer CVomplexes between NH_3 and the Halogens F_2, CIF, and Cl_2: An ab Initio Study on the Intermolecular Interaction

机译:NH_3与卤素F_2,CIF和Cl_2之间的电荷转移CVomplex:分子间相互作用的从头算研究

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摘要

The ground-state properties of the charge tranfer complexes formed between NH_3 and the halogens F_2, CIF, and Cl_2 were investigated systematically with the aid of ab initio calcualtions. Extended basis sets were applied and electron correlation was included at different levels of Moller-Plesset perturbation theory and coupled cluster expansions. Not only the level of electron correlation and the basis set chosen are important, but also the use of the counterpoise correction to the basis set superposition error directly in the course of the geometry optimization has a significant influence on the claculated equiilibrium structures. The trends in other ground-state properties of these complexes, such as vibrational spectra, infrared intensities, selected harmonic force constants, dipole moments, and nuclear quadrupole coupling constants are discussed and compared to experimental data. The strength of the intermolecular interaction in this series increases in the order NH_3-F_2, NH_3-Cl_2 and NH_3-CIF.
机译:借助于从头算来系统地研究了NH_3与卤素F_2,CIF和Cl_2之间形成的电荷转移配合物的基态性质。应用了扩展的基集,并在Moller-Plesset微扰理论和耦合的簇展开的不同水平上包括了电子相关性。不仅电子相关性的水平和选择的基组很重要,而且在几何优化的过程中直接对基组叠加误差使用平衡地校正对笼统的平衡结构也有重要影响。讨论了这些配合物的其他基态性质的趋势,例如振动光谱,红外强度,选定的谐波力常数,偶极矩和核四极耦合常数,并将其与实验数据进行了比较。该系列中的分子间相互作用的强度以NH_3-F_2,NH_3-Cl_2和NH_3-CIF的顺序增加。

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