高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (4): 590.

• 论文 • 上一篇    下一篇

二铬四醋酸基簇合物的定域分子轨道研究

李前树1, 胡旭光2, 曲红1   

  1. 1. 北京理工大学化工与材料学院, 北京, 100081;
    2. 吉林大学量子化学计算国家重点实验室, 长春, 130023
  • 收稿日期:1996-03-26 出版日期:1997-05-24 发布日期:1997-05-24
  • 通讯作者: 李前树, 53岁, 教授, 博士生导师.
  • 作者简介:李前树, 53岁, 教授, 博士生导师.
  • 基金资助:

    国家自然科学基金

INDO and Localized Molecular Orbitals Study on the Structures of Cr2(O2CR)4L2 Complexes

LI Qian-Shu1, HU Xu-Guang2, QU Hong1   

  1. 1. School of Chemical Engineering and Materials Science, Beljing Institute of Technology, Beijing, 100081;
    2. National Key Laboratory of Computations in Theoretical Chenlistry, Jilin University, Changchun, 130023
  • Received:1996-03-26 Online:1997-05-24 Published:1997-05-24

摘要: 利用INDO自治场半经验量子化学计算方法和Edmiston-Ruedenberg定域化方法,分别计算了不同Cr—Cr健长的气相、固相Cr2(O2CCH3)4分子和沿Cr-Cr方向有H2O配体的[Cr2(CO3)4(H2O)2]4-离子的化学键性质,结果表明:Cr2(O2CCH3)4在气相中存在d四重键,而在固相中则不存在,揭示了四重键与键长之间的联系.直接给出Cr-Crd四重键的量子化学图象,并阐明气相分子结构中在Cr-Cr键轴方向上存在着空的产轨道,从而使之表现出易于与配体相作用形成复合物的性质.

关键词: INDO, Edmiston-Ruedenberg定域化, Cr2(O2CR)4L2簇合物

Abstract: The structures of Cr2(O2CCH3)4 (gas state and solid state) and [Cr=(CO3)4·(H2O)2]4-have been investigated by using INDOsemiexperiential method and the Edmiston-Ruedenberg localization method.The relationship between d four-fold bond and bond lengthhas been analyzed and it can be found that there exit four-fold bonds between the tlyo Cratoms in Cr2 (O2CCH3)4 (gas state ) and [Cr2 (CO3)4 (H2O)2]4-.The quantum chemical pic-tures of d four-fold bonds are given directly.The similarities and differences of the bondingproperties of these complexes are discussed and it can be explained that Cr2 (O2CCH3)4 (gasstate) interacts easily with ligands to form a new complex due to empty p orbitals exiting onthe along Cr-Cr bond axis.

Key words: INDO, Edmiston-Ruedenberg localization method, Cr2(O2CR)4L2 complexes

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