机构地区: 广州大学化学化工学院
出 处: 《化学试剂》 2009年第10期781-784,共4页
摘 要: 合成了一个铜的双核配合物[Cu2(H2tea)2(dca)2]2.H2O(dca-=二氰胺盐;H3tea=三乙醇胺),通过元素分析和红外光谱对其进行了表征,并通过X-单晶衍射确定了其晶体结构。结果表明,该配合物属于单斜,空间群P21/c:a=2.1029(6)nm,b=1.2725(8)nm,c=1.8884(8)nm;β=112.9550(10)°,V=4.6537(1)nm3,Mr=1129.14,Dc=1.612g/cm3,F(000)=2328.0,R1=0.0368(7515),wR2=0.0977(10146),I>2σ(Ⅰ)。晶胞中含有两个独立结构的双核铜[Cu2(H2tea)2(dca)2]分子和一个水分子。每个双核铜的两个Cu2+离子都是通过来自不同H2tea-中的两个已脱质子的羟乙基氧(μ2—O)桥连而成。其中一个独立结构的双核铜中,两个Cu2+均与配位原子形成六配位的拉长八面体。另一个独立结构的双核铜中,1个Cu2+与配位原子形成六配位的拉长八面体,而另1个Cu2+与配位原子形成五配位的四角锥。 A dinuclear copper ( Ⅱ ) complex [ Cu2 ( H2tea)2- (dca)2 ]2· H2O ( dca^- = dicyanamide, Hatea = triethanolamine) was synthesized and structurally characterized by the single crystal X-ray diffraction method. Crystals of the title complex were of the monoclinical system, with a space group of P21/c, a = 2. 102 9(6) nm, b = 1.272 5(8)nm, c = 1.888 4(8)nm,β = 112.955 0(10)°, V = 4.653 7(1)nm^3, Mr = 1 127.13, Dc = 1.609 g/cm^3, F(000) = 2 320.0, R1 = 0.037 5(7 515), wR2 = 01102 6(10146),and 1 〉 2σ( Ⅰ ).The unit cell contained two independent dinuelear copper complexes and one H2O. Two Cu^2+ ions in one independent dinuelear species were all six-coordinated to form a distorted dodecahedron. In another independent dinuclear complex, one Cu^2+ ion formed a distorted dodecahedron and another Cu^2+ ion was five-coordinated to form a distorted tetragonal pyramid. Two Cu^2+ ions in every dinuclear complex were bridged by two alkoxo groups arising from the deprotonated hydrocthyl group of H3tea.