H_4[Co(2,2′-bipy)_3][As_2W_(18)O_(62)]·18.5 H_2O的水热合成及晶体结构  

Hydrothermal Synthesis and Crystal Structure of H_4[Co(2,2′-bipy)_3] [As_2W_(18)O_(62)] ·18.5H_2O

作　　者：杨冬[1] 于丽[1] 王伟[1] 王敬平[1] 

机构地区：[1]河南大学化学化工学院分子与晶体工程研究所,河南开封475004

出　　处：《河南大学学报（自然科学版）》2008年第2期148-152,共5页Journal of Henan University:Natural Science

基　　金：河南省高校新世纪优秀人才支持计划(2005HANCET-02);河南省自然科学基金;河南省优秀青年骨干教师培养计划;河南大学校重点基金资助

摘　　要：以Na2HAsO4.7H2O,Na2WO4.2H2O,CoCl2.2H2O和2,2-′bipyridine为原料,利用水热合成法得到了分子式为H4[Co(2,2-′bipy)3][As2W18O62].18.5H2O的有机-无机复合物,并对其进行了元素分析、IR及X-射线单晶衍射表征.结构测定表明,该化合物属于六方晶系,P-6 2c空间群,晶胞参数:a=1.290 89(8)nm,b=1.290 89(8)nm,c=2.826 6(2)nm,α=90°,β=90°,γ=120°.V=4.079 2(5)nm3,Z=2,R1=0.026 5,wR2=0.065 1.标题化合物分子是由1个手性的[Co(2,2-′bipy)3]2+配阳离子,1个孤立的[As2W18O62]6-阴离子及18.5个游离的H2O分子组成.IR光谱和X-射线单晶衍射结果表明,在固态下,杂多阴离子[As2W18O62]6-与[Co(2,2-′bipy)3]2+配阳离子之间存在着相互作用.An organic-inorganic complex H1[Co（2,2′-bipy）3][As2W18O62]·18.5H2O has been synthesis from Na2 HAsO1·7H2O, Na2WO1·2H2O, Cocl·2H2O and 2,2′-bipyridine by hydrothermal method and characterized by element analysis, IR and X-ray diffraction. The X-ray crystallography indicates that the title compound crystallizes in Hexagonal lattice, P-6 2c space group, with a=1. 290 89（8） nm, b=1.290 89（8） nm, c=2.826 6 （2） nm, α=90°,β=90°,γ=120°.V=4.0792（5）nm^3,Z=2,R1=0.0265,ωR2=0.0651. The moleculeofthe title compound is composed of one chiral [Co（bipy）3]^2 coordination cation, one independent [As2W18O62]^6 anion and eighteen and a half dissociative water molecules. The results of IR spectra and X-ray single crystal diffraction reveal that there is comparatively stronger interaction between organic groups [Co （2, 2′-bipy）3]^2 and heteropolyanions [As2W18O62]^6 in the solid state.

关 键 词：DAWSON结构 有机-无机复合物 水热合成 晶体结构 

分 类 号：O174.2[理学—数学]