Theoretical Study of M(+)-RG2: (M(+) = Ca, Sr, Ba, and Ra; RG = He-Rn).

Theoretical Study of M(+)-RG2: (M(+) = Ca, Sr, Ba, and Ra; RG = He-Rn).
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M( )-RG2 的理论研究:(M( ) = Ca、Sr、Ba 和 Ra;RG = He-Rn)。

DOI:
10.1021/jp511817g
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发表时间:
2015
期刊:
The journal of physical chemistry. A
影响因子:
--
通讯作者:
Andrejeva A
Andrejeva A
中科院分区:
--
文献类型:
--
作者:
Andrejeva A

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对M+ - rg2种进行初始化计算,其中M+= Ca, Sr, Ba, Ra, RG = He-Rn。几何已被优化,并削减通过势能面包含每个全局最小值已在理论的MP2级计算,采用三重-ζ质量基础集。采用四重-ζ质量基集理论的RCCSD(T)能级计算了这些配合物的相互作用能。通过分析电子密度,讨论了结合能、De、平衡键长、Re和键角的变化趋势。提出了Mulliken、自然种群和原子-分子(AIM)种群分析。研究发现,这些涉及较重的2族金属的配合物中,有些是弯曲的,而另一些则是线性的,这与之前发现的相应的含Be和Mg金属的配合物是弯曲的不同。结果讨论了轨道杂交和不同类型的相互作用存在于这些物种。
Ab initiocalculations were employed to investigate M+–RG2species, where M+= Ca, Sr, Ba, and Ra and RG = He–Rn. Geometries have been optimized, and cuts through the potential energy surfaces containing each global minimum have been calculated at the MP2 level of theory, employing triple-ζ quality basis sets. The interaction energies for these complexes were calculated employing the RCCSD(T) level of theory with quadruple-ζ quality basis sets. Trends in binding energies,De, equilibrium bond lengths,Re, and bond angles are discussed and rationalized by analyzing the electronic density. Mulliken, natural population, and atoms-in-molecules (AIM) population analyses are presented. It is found that some of these complexes involving the heavier group 2 metals are bent whereas others are linear, deviating from observations for the corresponding Be and Mg metal-containing complexes, which have all previously been found to be bent. The results are discussed in terms of orbital hybridization and the different types of interaction present in these species.
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