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Intermolecular interactions between hypervalent molecules: Ph2IX and XF3 (X=Cl, Br, I) dimers

机译:高价分子:Ph2IX和XF3(X = Cl,Br,I)二聚体之间的分子间相互作用

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The intermolecular bonding in dimers of the T-shaped hypervalent title compounds is analyzed using a combination of density functional calculations and qualitative arguments. Fragment molecular orbital interaction diagrams lead us to the conclusion that the bonding in these species can be understood using the language of donor-acceptor interactions: mixing between occupied states on one fragment and unoccupied states on the other. There is also a strong electrostatic contribution to the bonding. The calculated strengths of these halogen-halogen secondary interactions are all less than 10 kcal mol(-1). There is a very soft potential energy surface for the deformation that makes the bridge in the dimers asymmetrical. [References: 49]
机译:T型高价标题化合物的二聚体之间的分子间键合是使用密度泛函计算和定性论证的组合进行分析的。片段分子轨道相互作用图使我们得出以下结论:可以使用供体-受体相互作用的语言来理解这些物种之间的键合:一个片段上的占据状态与另一个片段上的未占据状态之间的混合。粘结也有很强的静电作用。这些卤素-卤素二级相互作用的计算强度都小于10 kcal mol(-1)。形变存在非常柔软的势能面,使二聚体中的电桥不对称。 [参考:49]

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