化学学报 ›› 1992, Vol. 50 ›› Issue (11): 1056-1062. 上一篇    下一篇

研究论文

CH~2Br~2分子中Fermi共振的研究

俞柏恒;王一飞;梁映秋;唐敖庆   

  1. 华东工学院化学系;吉林大学理论化学研究所
  • 发布日期:1992-11-15

Investigation of fermi resonances in CH~2Br~2 molecule

YU BAIHENG;WANG YIFEI;LIANG YINGQIU;TANG AOQING   

  • Published:1992-11-15

本文在分子内坐标表象上构造了CH~2X~2分子的振动量子Hamilton算子,给出了计算CH~2X~2分子的CH伸缩振动与HCH弯曲振动的Fermi共振新方法.结合已有的泛频数据,采用69个变分基组,具体计算了CH~2Br~2和CD~2Br~2分子的泛频谱.理论频率与实验频率符合得很好,并且得到一组包括势能常数f~raa在内的力场拟合值.

关键词: 振动光谱, 二溴甲烷, 费米共振

An internal coordinate Hamiltonian is presented to analyze Fermi resonances between CH stretching and HCH bending modes. The overtone spectra of CH2Br2 and CD2Br2 mols. are calculated by using 69 basis sets and available experimental data. The calculated frequencies are in agreement with the experimental Also new force field constants including fraa are obtained.

Key words: VIBRATIONAL SPECTRUM, DIBROMOMETHANE (= METHYLENE BROMIDE), FERMI RESONANCE

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