关键词: 六元杂环化合物, 晶体结构, 氢键

Abstract: A new six-membered heterocyclic compound including four nitrogen atoms was obtained. The compound [NH₃(CH₂)₂NH(CH₂CH₂)₂NH(CH₂)₂NH₃]·(ClO₄)₄·4H₂O was characterized by X-ray single crystal diffraction,elemental analysis,IR, ¹H NMR and MS. It belongs to a monoclinic system,P2₁/n,with a=0.787 34(7) nm, b=1.966 98(18) nm, c=0.820 75(8) nm, β =103.396(2)° and Z= 2. The molecular structure consists of six-membered heterocyclic NH₃(CH₂)₂NH(CH₂CH₂)₂NH(CH₂)₂NH₃,ClO₄^- and H₂O. The six-membered heterocyclic is a stable chair conformation. Various hydrogen bonds are formed among nitrogen atoms,ClO₄^- anion and water molecules. This compound may be a better heterocyclic ligand containing four nitrogon atoms,which can perhaps be employed to aggregate with transitional metal atoms and generate new complexes.

Key words: Six-membered heterocyclic compound, Crystal structure, Hydrogen bond