合成了一种中心对称的草酰胺桥联异三核配合物 {[Ni(oxbe) ]2 Mg(H2 O) 2 }·2DMF·DMA[oxbe为N (2 羧基苯 ) N′ (2 氨乙基 )不对称草酰胺 (H3 oxbe)的脱氢阴离子 ;DMF为N ,N 二甲基甲酰胺 ;DMA为二甲胺 ]。用单晶X射线衍射法测定了它的晶体结构 ,该晶体属单斜晶系 ,空间群C2 c ,晶胞参数a=2 2 61 7(5 ) ,b =1 7 1 73 (4 ) ,c=1 0 881 (4 ) ,β =1 1 5 40 (2 )°,V =3 81 8(2 ) 3 ,Ni2 MgC3 0 H44N8O13 ,Mr=866 46,Z =4,Dc=1 5 0 8g cm3 ,μ(MoKα) =1 0 75mm-1,F(0 0 0 ) =1 80 8,R =0 0 660 ,wR =0 1 772 (I >2б(I) ) ,3 75 5个可观察衍射点。该三核分子为中心对称结构 ,镁离子位于 6个氧原子所构成的变形八面体的中心 ,两个镍离子则分别位于两端由N3 O构成的近似平面四方场中 ,中心Mg2 + 与两端的Ni2 + 通过草酰胺阴离子桥联在一起。 A centrosymmetric oxalate bridged heterotrimeric complex was synthesized by the reaction of [Mg (H 2 O) 2} 2DMF · DMA [oxbe is N (2 carboxybenzene) N ) Asymmetric oxalate dehydrogenation anion; DMF is N, N-dimethylformamide; DMA is dimethylamine]. Its crystal structure is determined by single crystal X-ray diffraction. The crystal belongs to the monoclinic system with space group C2 c, unit cell parameters a = 2 2 61 7 (5), b = 1 7 1 73 (4), β = 1 1 5 40 (2) °, V = 3 81 8 (2) 3, Ni2 MgC3 0 H44N8O13, Mr = 866 46, Z = 4, Dc = 1508 g cm 3, μ (MoKα) = 1 0 75mm-1, F (0 0 0) = 1 80 8, R = 0 0 660, wR = 0 1 772 (I> 2б (I) Diffraction point. The trinuclear molecule is a symmetric center structure. Magnesium ions are located in the center of the deformed octahedron composed of six oxygen atoms. Two nickel ions are respectively located in the approximate plane tetragonal field with N3 O at both ends. The center Mg2 + The terminal Ni2 + is bridged by the oxalate anion.