Calculations of thermodynamic stability of CpCoC2B9H11 cobaltacarborane isomers

Calculations of thermodynamic stability of CpCoC2B9H11 cobaltacarborane isomers
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CpCoC2B9H11 钴碳硼烷异构体的热力学稳定性计算

DOI:
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发表时间:
2005
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影响因子:
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通讯作者:
A. Kudinov
A. Kudinov
中科院分区:
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文献类型:
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作者:
D. Perekalin;A. Kudinov

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通过 DFT 方法 (PBEPBE/DGDZVP/DGA1) 对 12 顶点钴碳硼烷 CpCoC2B9H11 (1) 九种可能的异构体的几何结构和能量进行了量子化学计算。异构体的热力学稳定性随着笼中碳原子之间距离的增加而增加,并且几乎与 CpCo 顶点的位置无关。 1 的 1,2,3-(17.57 kcal mol−1)、1,2,4-(3.72 kcal mol−1) 和 1,2,9-异构体 (0 kcal mol−1) 的相对稳定性与邻位异构体 (17.61 kcal mol−1)、间位异构体 (3.21 kcal mol−1) 和对位异构体 (0 kcal) 的相应值相似mol−1) 的碳硼烷 C2B10H12。本研究的结果证实了金属碳硼烷化学中 CpCo 和 BH 片段的密切相似性。
Quantum-chemical calculations of the geometry and energies of nine possible isomers of 12-vertex cobaltacarborane CpCoC2B9H11 (1) were carried out by the DFT method (PBEPBE/DGDZVP/DGA1). Thermodynamic stability of the isomers increases with increasing distance between the carbon atoms in the cage and is virtually independent of the position of the CpCo vertex. The relative stabilities of the 1,2,3-(17.57 kcal mol−1), 1,2,4-(3.72 kcal mol−1), and 1,2,9-isomers of 1 (0 kcal mol−1) are similar to the corresponding values for the ortho (17.61 kcal mol−1), meta (3.21 kcal mol−1), and para isomers (0 kcal mol−1) of carborane C2B10H12. The results of the present study confirm a close similarity of the CpCo and BH fragments in metallacarborane chemistry.