高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 440.

• 研究论文 • 上一篇    下一篇

N-甲硝胺二聚体分子间相互作用的理论研究

居学海, 肖鹤鸣, 贡雪东   

  1. 南京理工大学化学系, 南京 210094
  • 收稿日期:2000-11-10 出版日期:2002-03-24 发布日期:2002-03-24
  • 通讯作者: 肖鹤鸣(1940年出生),男,教授,博士生导师,从事量子化学和分子材料学研究.E-mail:xiao@mail.njust.edu.cn E-mail:xiao@mail.njust.edu.cn
  • 基金资助:

    中国工程物理研究院自然科学技术基金(批准号:99050330);教育部博士后专项基金资助

Theoretical Study on the Intermolecular Interaction of N-methyl Nitroamine Dimers

JU Xue-Hai, XIAO He-Ming, GONG Xue-Dong   

  1. Department of Chemistry, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2000-11-10 Online:2002-03-24 Published:2002-03-24

摘要: 用abinitio方法,在HF/6-31G*水平下求得N-甲硝胺二聚体势能面上3种优化构型,经MP4和MP2校正电子相关能及校正基组叠加误差(BSSE),求得分子间最大相互作用能为-18.81kJ·mol-1.甲基内旋转对相互作用能影响较大.在标准状态下,由单体形成最稳定二聚体的自由能变化为10.02kJ·mol-1.同时还讨论了温度对过程的影响.

关键词: N-甲硝胺二聚体, 分子间相互作用, 从头计算法, 热力学性质

Abstract: Three optimized geometries of N-methyl nitroamine dimers were obtained with %ab initio% calculation at HF/6-31G* level. All the binding energies of the dimers, evaluated as the sum of the HFinteraction energy and MPcorrelation interaction energy, are corrected for the basis set superposition errors(BSSE) and for zero point energies(EZP). The corrected combining energy of the most stable dimer is -18.81 kJ·mol-1. The internal rotation of methyl has an influence on the intermolecular interaction. The change of the Gibbs free energy proceeding from monomer to the most stable dimer is 10.02 kJ·mol-1 at 298.2 K. The effect of temperature on the process has also been discussed.

Key words: N-methyl nitroamine, Intermolecualr interaction, Ab initio, Thermodynamic properties

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