二-μ-羟基二联吡啶铜(Ⅱ)二高氯酸根的晶体结构及弱相互作用

制备了羟基桥连的双核铜化合物Cu2(bipy)2(OH)2](ClO4)2 (bipy= 2,2'-bipyridine) ,用X-射线方法测定了它的晶体结构.晶体属三斜晶系,空间群C2/m,α= 13.569(3), b= 15.212(3), c = 6.2715(10)A,β= 113.620(10), V = 1 188.4(4) A3, Dc = 1.879 g/m3, Z = 2,分子式 C20H18Cl2Cu2N4O10,分子量Mr = 672.36, F(000) = 676.0.化合物的结构由1个Cu(bipy)2(OH)2]2+阳离子和2个弱配位的高氯酸根组成,每个阳离子内的2个Cu(II)通过2个羟基桥连接,Cu(II)原子表现出CuO2N2 四方平面构型.分子内存在高氯酸根的Cu(1)…O(3) 弱配位键,分子间存在O(1)-H(1)A…O(2)和C(1)-H(1)B…O(2)2种类型的氢键.

Crystal structure and weak interactions of di-μ-hydroxo-bis[bipyridylcopper(Ⅱ)] diperchlorate

The hydroxyl-bridged binuclear copper(Ⅱ) compoundCu2(bipy)2(OH)2] (ClO4)2 (bipy=2,2′-bipyridine) has been prepared and its crystal structure determined by X-ray diffraction methods, crystallizes in the Triclinic system, space group C2/m, with a = 13.569(3), b = 15.212(3), c = 6.2715(10)A, β = 113.620(10)°, V = 1 188.4(4)A3,Dc = 1.879 g/m3, Z = 2, C20H18Cl2Cu2N4O10, Mr = 672.36, F(000) = 676.0. The structure consists of a binuclear cation Cu(bipy)2(OH)2]2+ and two coordinated weakly perchlorates. Within each cation the two copper(Ⅱ) ions linked through two hydroxo-groups bridges, the copper(Ⅱ) atoms exhibited a CuO2N2 square planar geometry. The weak interactions existed as the intramolecular weak coordination bonds of Cu(1)...O(3) from the perchlorate, and two intermolecular hydrogen bonds of O(1)-H(1)A...O(2) and C(1)-H(1)B...O(2).