Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (01): 41-49. Previous Articles     Next Articles

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C4H4Y (Y=O, S, Se)与BX3 (X=H, F, Cl)作用的计算化学研究

(江西科技师范学院江西省有机功能分子重点实验室 南昌 330013)   

  1. 采用量子化学的密度泛函B3LYP和二阶微扰MP2(full)方法对C4H4Y (Y=O, S, Se)与BX3 (X=H, F, Cl)形成的电子授受型复合物进行了研究, 所得18个复合物的构型包括BX3位于C=C双键上方的π-p作用型和B与O, S, Se直接作用的n-p作用型. 体系C4H4Y-BH3以n-p作用型较为稳定, 体系C4H4Y-BF3, C4H4Y-BCl3的π-p和n-p作用型复合物稳定性相当. 对各复合物的几何构型、振动频率和自然键轨道分析表明, 复合物的形成过程中均存在几何构型的改变、电荷的转移和振动频率的变化, 它们的变化规律与复合物稳定性的变化规律基本一致, 即按H, F, Cl的顺序依次降低.
  • 投稿日期:2009-02-26 修回日期:2009-08-28 发布日期:2010-01-20
  • 通讯作者: 徐景坤 E-mail:xujingkun@mail.ipc.ac.cn;xujingkun@tsinghua.org.cn
  • 基金资助:

    江西省教育厅基金(GJJ09574);国家自然科学基金(50663001)

Computational Study on the Interaction of C4H4Y (Y=O, S, Se) with BX3 (X=H, F, Cl)

Li Yuzhen, Xu Jingkun*, Nie Yuting, Zeng Bin   

  1. (Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013)
  • Received:2009-02-26 Revised:2009-08-28 Published:2010-01-20

The geometries and binding energies of the complexes between C4H4Y (Y=O, S, Se) and BX3 (X=H, F, Cl) have been calculated at the density function theory B3LYP and the second-order M?ller-Plesset theory MP2(full) levels. The vibration and natural bond orbital analyses were carried out, which indicate that the 18 conformers obtained include π-p interaction (the BX3 locating exactly above the C=C double bond) and n-p interaction (the boron atom directly combining to O, S or Se). The stabilities of C4H4Y-BH3 complexes are in the order of n-p>π-p. The stabilities of C4H4Y-BF3 and C4H4Y-BCl3 complexes with n-p interaction are relative to the π-p type complexes. The calculated results show that charge transfers, frequency shifts and change of geometries are relative to the stabilities of the complexes in the forming process.

Key words: density function theory, C4H4Y-BX3 system, π-p interaction, n-p interaction