Chem. J. Chinese Universities ›› 2004, Vol. 25 ›› Issue (1): 124.

• Articles • Previous Articles     Next Articles

Ab initio Studies on the Structures of the Hydrogen-bond Clusters C5H10NH(NH3)n(n=1—3)

SHI Tu-Jin, WANG Xu, TIAN Zhi-Xin, ZHU Qi-He   

  1. State Key Laboratory of Molecular Reaction Dynamics, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2003-01-06 Online:2004-01-24 Published:2004-01-24

Abstract: The equilibrium geometrical structures of hydrogen-bond clusters C5H10NH(NH3)n(n=1—3) were studied by ab initio MO theory with RHF/6-31G(d) basis set level. The calculated results show that the most stable structures of C5H10NH(NH3)n are one linear hydrogen-bonding, three-cyclic and four-cyclic structures for n=1, 2, 3, respectively. At MP2/6-31G(d)//B3LYP/6-31G(d) level, the MO population analysis of the most stable configurations C5H10NH(NH3)n(Ⅰ)(n=1—3) has been employed, and the corresponding occupied molecular orbitals have been assigned. Their calculated vertical ionization potentials(P) show that the formation of hydrogen bonds causes the P values to decrease.

Key words: H-pyridine, Hydrogen-bond, Molecular clusters, Ab initio

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