高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (11): 2133.

• 研究论文 • 上一篇    下一篇

从头算VB-MP2组合方法

宋凌春, 鲁兰原, 吴玮, 曹泽星, 张乾二   

  1. 厦门大学化学系, 物理化学研究所, 固体表面物理化学国家重点实验室, 厦门361005
  • 收稿日期:2002-02-21 出版日期:2002-11-24 发布日期:2002-11-24
  • 通讯作者: 吴 玮(1962年出生),男,博士,教授,博士生导师,从事量子化学计算研究.
  • 基金资助:

    国家自然科学基金(批准号:20073033,29892166,29803006)资助

VB-MP2: A Hybrid Method Combining Valence Bond Theory and Many-body Perturbation Theory

SONG Ling-Chun, LU Lan-Yuan, WU Wei , CAO Ze-Xing, ZHANG Qian-Er   

  1. Department of Chemistry, Institute of Physics Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China
  • Received:2002-02-21 Online:2002-11-24 Published:2002-11-24

摘要: 提出了一种经济实用的价键计算方法VB-MP2方法.将体系的电子分为非活性电子和活性电子,应用MP2方法计算非活性电子的相关能效应,用VB方法处理活性电子.测试计算表明,该方法保持了价键方法的特点,且计算结果比传统的使用芯-价分离技术的价键方法有较大的改善.

关键词: 从头算, 价键理论, VB-MP2

Abstract: A practical valence bond method, called VB-MP2, is presented. The method combines valence bond method and many-body perturbation theory by using MP2 method to get the electronic correlation of inactive electrons. The bond energies of some molecules, such as F2, Cl2, Br2, CH3Lietc., are computed by using the VB-MP2 method. Testing calculations show that VB-MP2 method has the qualities of a VB method along with a quantitative advantage over VB-only method in comparison with traditional core-valence separation.

Key words: A b initio, Valence bond theory, VB-MP2

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