化学学报 ›› 2003, Vol. 61 ›› Issue (2): 161-165. 上一篇    下一篇

研究论文

过渡金属正离子和卡宾配合物成键特征的理论分析

丁涪江   

  1. 四川师范大学化学系
  • 发布日期:2003-02-15

Theoretical Analyses of Bond Character of Transition-Metal Ionswith Carbene Complexes

Ding FuJiang   

  1. Department of Chemistry,Sichuan Normal University
  • Published:2003-02-15

在6—311C基组从头算的基础上对第一过渡系含偶数电子的金属正离子(Sc^+, V^+,Mn^+,Co^+,Cu^+)与卡宾CH2的配合物的成键特征进行了细致的分析。用能 级位移算符逐步降低分子片空轨道能级的方法代替分子片轨道冻结,使KSM能量分 解的耦合项得以消除。能量分析结果表明,Sc^+-CH2键是由σ供键,π供键与π反 馈键组成的,不能忽略π供键。而Cu^+-CH2键是由σ供键与σ,π反馈键组成的, 不能忽略σ反馈键。同时对VCH2^+,MnCH2^+和CoCH2^+的^1A1电子态也进行了粗略 的讨论。

关键词: 碳烯, 从头计算法, 钪络合物, 钒络合物, 锰络合物, 钴络合物, 铜络合物, 电子态, 电子态

Ab initio MO calculations were carried out on transition-metal ions (Sc~+ , V~+ , Mn~+ , Co~+ , and Cu~+ ) with carbene (CH-2) at RHF/6- 311G level. In order to gain additional insight into the nature of bonding in these complexes, energy decomposition analyses were performed in detail using a one-electron shift operator. With this method the coupling term in the energy decomposition analyses could be eliminated completely. According to our calculations, the bond of Sc~ + -CH-2 formed by the a and TC donating interactions and the TT back- donating interaction, but the bond of Cu ~+ -CH is composed of the a donating interaction and the a and TT back-donating interactions. The bonds in other complexes were also discussed in brief.

Key words: CARBENE, AB INITIO CALCULATION, SCANDIUM COMPLEX, VANADIUM COMPLEX, MANGANESE COMPLEX, COBALT COMPLEX, COPPER COMPLEX, ELECTRONIC STATES

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