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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Secondary hydrogen isotope effects on the structure and stability of cationπ complexes (cation = Li~+, Na~+, K~+ and π = acetylene, ethylene, benzene)
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Secondary hydrogen isotope effects on the structure and stability of cationπ complexes (cation = Li~+, Na~+, K~+ and π = acetylene, ethylene, benzene)

机译:次级氢同位素对阳离子π配合物的结构和稳定性的影响(阳离子= Li〜+,Na〜+,K〜+和π=乙炔,乙烯,苯)

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摘要

Secondary hydrogen isotope effects on the geometries, electronic wave functions and binding energies of cationπ complexes (cation = Li~+, Na~+, K~+ and π = acetylene, ethylene, benzene) are investigated with NEO/HF and NEO/MP2 methods. These methods determine both electronic and nuclear wave functions simultaneously. Our results show that an increase of the hydrogen nuclear mass leads to the elongation of the cationπ bond distance and the decrease in its binding energy. An explanation to this behavior is given in terms of the changes in the π-molecule electronic structure and electrostatic potential induced by isotopic substitutions.
机译:使用NEO / HF和NEO / MP2研究了次级氢同位素对阳离子π配合物(阳离子= Li〜+,Na〜+,K〜+和π=乙炔,乙烯,苯)的几何形状,电子波函数和结合能的影响方法。这些方法同时确定电子和核波功能。我们的结果表明,氢核质量的增加导致阳离子π键距离的延长和其结合能的降低。根据π分子电子结构的变化和同位素取代引起的静电势,对此行为进行了解释。

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