两个含有Strandberg结构的“哑铃型”过渡金属配合物

Two "Dumbbell-like" transition metal complexes based on strandberg-type phosphomolybdate

采用常规合成方法得到了2个由过渡金属桥连Strandberg型钼磷酸盐阴离子的配合物:(H2biim)7H9[m-Fe(H2O)4(P2Mo5O23)2].10H2O(1)和(H2biim)7H10[m-Mn(H2O)4(P2Mo5O23)2].10H2O(2)(H2biim=2,2′-联咪唑).通过单晶X-射线衍射分析、元素分析、IR光谱及电化学分析等方法进行了表征.结构分析表明:化合物1和2为同构化合物,属于三斜晶系,Pī空间群.分子中2个{P2Mo5}单元以过渡金属离子为反演对称中心位居两侧构成似"哑铃型"的结构,并通过氢键与联咪唑分子构筑成三维孔道结构.

Two complexes with bis-Strandberg-type phosphomolybdate structures bridged by two transition metal ions, （H2 biim）7H9[μ-Fe （H2O）4 （P2Mo5O23）2]·10H2O 1 and （ H2 biim）7H10[μ-Mn（H2O）4（P2Mo5O23）2]·10H2O2 （H2biim = 2, 2＇-biimidazole） have been synthesized under routine synthetic method. They have been characterized by single-crystal X-ray diffraction, elemental analysis, IR spectroscopy and electrochemical analysis. Crystal structure analysis reveals that two complexes are iso-structural and crystallized in the triclinic system, space group Pi. As a center of inversion symmetry, the transition metal atom is situated on both sides by two { P2Mo5 } clusters. Such a link- age constructed a dumbbell-like structure, and 3D tunnel structure is formed by connecting H2 biim with hydrogen bonding.