有机化学 ›› 2004, Vol. 24 ›› Issue (3): 300-305. 上一篇    下一篇

研究论文

苯并咪唑衍生物的合成、晶体结构及量子化学计算

卑凤利, 陈海群, 杨绪杰, 陆路德, 汪信*   

  1. 南京理工大学化工学院 材料化学实验室 南京 210094
  • 收稿日期:2003-08-12 修回日期:2003-10-13 接受日期:2003-11-14 发布日期:2022-09-20

Synthesis, Crystal Structure and Quantum Chemical Calculation of Benzimidazole Derivatives

BEI, Feng-Li, CHEN, Hai-Qun, YANG, Xu-Jie, LU, Lu-De, WANG, Xin*   

  1. Materials Chemistry Laboratory, Nanjing University of Science and Technology, Nanjing 210094
  • Received:2003-08-12 Revised:2003-10-13 Accepted:2003-11-14 Published:2022-09-20
  • Contact: *E-mail: liutaiqi@bipt.edu.cn

合成了两种苯并咪唑衍生物:2-苄基-苯并咪唑(1)和1-苄基-2-苯基-苯并咪唑(2).用元素分析、红外光谱和核磁共振氢谱对产物进行了表征,并且测定了它们的单晶结构.化合物1属正交晶系,空间群Pbca, a=0.93783(6), b=0.97155(6),c=2.49187(16) nm, V=2.2705(2) nm3, Dc=1.218 g/cm3, Z=8, F(000)=880, μ=0.073 mm-1, R=0.0816, wR=0.1698, GOF=0.948.化合物2属单斜晶系,空间群P21/c, a=0.60272(12), b=1.7059(3), c=1.5257(3) nm, β=91.45(3)°, V=1.5682(5) nm3, Dc=1.204 g/cm3, Z=4, F(000)=600, μ=0.071 mm-1, R=0.0730, wR=0.1215, GOF=1.191.采用量子化学方法,在B3LYP/6-31G*水平上计算了标题化合物1和2的优化构型、电荷分布和热力学函数.

关键词: 苯并咪唑, 晶体结构, 量子化学计算

Two benzimidazole derivatives, 2-benzyl-1H-benzimidazole (1) and 1-benzyl-2-phenyl-1H-benzimidazole (2), were synthesized and characterized by elemental analysis, IR, and1H NMR spectra. Their crystal structures were determined by X-ray singlecrystal diffraction. The compoud 1 belongs to orthorhombic system with space group Pbca, a=0.93783(6) nm, b=0.97155(6) nm, c=2.49187(16) nm, V=2.2705(2) nm3, Dc=1.218 g/cm3, Z=8, F(000)=880, μ=0.073 mm-1, R=0.0816, wR=0.1698,GOF=0.948. The compoud 2 belongs to monoclinic system with space group P21/c, a=0.60272(12) nm, b=1.7059(3) nm, c=1.5257(3) nm, β=91.45(3)°, V=1.5682(5) nm3, Dc=1.204 g/cm3,Z=4, F(000)=600, μ=0.071 mm-1, R=0.0730, wR=0.1215, GOF=1.191. The DFT-B3LYP methods with 6-31G* basis set have been applied to optimization of the title compounds 1 and 2. Their charges distribution and thermodynamic function were investigated.

Key words: benzimidazole derivative, crystal structure, quantumchemical calculation