高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (5): 888.

• 研究论文 • 上一篇    下一篇

B2F2分子异构体结构的量子化学计算研究

于海涛1,2, 黄旭日1, 池玉娟2, 傅宏刚1,2, 丁益宏1, 李泽生1, 孙家锺1   

  1. 1. 吉林大学理论化学研究所, 理论化学计算国家重点实验室, 长春 130023;
    2. 黑龙江大学化学化工学院, 哈尔滨 150080
  • 收稿日期:2001-01-08 出版日期:2002-05-24 发布日期:2002-05-24
  • 通讯作者: 傅宏刚(1962年出生),男,博士,教授,从事功能材料及结构化学研究.E-mail:fuhg@hlju.edu.cn E-mail:fuhg@hlju.edu.cn
  • 基金资助:

    基金项目:国家自然科学基金(批准号:20171015,20171016);黑龙江省自然科学基金(e00、16);黑龙江大学杰出青年科学基金(2002)资助.

Theoretical Studies on the Structure and Stability of B2F2 Molecule

YU Hai-Tao1,2, HUANG Xu-Ri1, CHI Yu-Juan2, FU Hong-Gang1,2, DING Yi-Hong1, LI Ze-Sheng1, SUN Chia-Chung1   

  1. 1. State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China;
    2. College of Chemistry and Chemical Engineering, Heilongjiang University, Harbin 150080, China
  • Received:2001-01-08 Online:2002-05-24 Published:2002-05-24

摘要: 采用abinitio方法对B2F2分子异构体的结构进行了计算研究,并与Al2F2分子进行了比较.结果表明,B2F2具有D∞h对称性,3Σg电子态的直线型结构FBBF是B2F2分子的最稳定异构体,对文献的结果进行了修正.在UCCSD(T,full)/6-311+G(2df)水平下,F—B和B—B键长分别为0.12942和0.14820nm,振动频率出现在1860.00和1320.62cm-1处.在UQCISD(T,full)/6-311+G(2df)//UMP2(full)/6-311+G(d)+ZPVE水平下,3Σg态的线性FBBF分子的垂直电离势为848.58kJ/mol,而由3Σg电子态的BF二聚为3Σg态的线性FBBF分子的焓变为59.86kJ/mol,此二聚化反应是放热反应,说明二聚化过程在能量上是有利的.

关键词: B2F2 分子, 从头算, 分子结构, 二聚化反应焓

Abstract: The structure and stability of B2F2 molecule have been predicated by means of ab initio molecular orbital methods.The results show that the linear FBBF that has D∞h symmetry and 3Σg electronic state is the most stable isomer.The F—B and B—B bond distances are 0.12942 and 0.14820 nm at UCCSD(T, full)/6-311 + G(2df) level of theory, respectively.The vibrational frequencies appear at 1860.00 cm-1 and 1320.62 cm-1.The dimerization enthalpy of BF(1Σg+) and vertical ionic potential of the linear FBBFat UQCISD(T,full)/6-311 + G(2df)// UMP2(full)/6-311G(d)+ ZPVElevel of theory are 59.86 and 848.58 kJ/mol, respectively.

Key words: B2F2 molecule, Ab initio calculation, Molecular structure, Dimerization enthalpy

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