Preparation and Molecular Structure of Binuclear Nickel (Ⅱ)Complex Bridged by 1,2, 4, 5-Benzenetetracarboxylato Tetravalent Anion

• 来源期刊: 中国化学（英文版）
• 学科: 化学
• 年，卷（期）: 2001,（3）
• 页码范围: 321-324
• 页数: 4页
• 分类号: O6
• 语种: 英文

摘要

The title complex [(H2O)2(IMI)3Ni(TCB)Ni(IMI)3-(H2O)2] H2O (TCB=1, 2, 4, 5-benzenetetracarboxylato te-travalent anion; IMI=imidazole) has been prepared by the reaction of Ni(IMI)3(Ac)2 and TCB in aqueous solution. The crystal structure has ben determined by single-crystal X-ray diffraction method.It crystallizes the monoclinic system,space group P21/c( # 14), a = 1.2714(4) mn, b = 0.9411(3) nm, c =1.5869(4) nm, β=108.54(2)°, V=1.8001(9)mm3, Z=2. Tne main feature of the crystal structure is a symmetric binuclear unit made up o two slightly distorted coordination octahedrons,which are bridged by TCB in monodentate fashion to each metal ion. Moreover three nitrogen atoms from three imidazoles, three oxygen atoms from two water molecules and one carboxylate group of TCB coordinated to a nickel(Ⅱ) ion are found on a face of the octahedron respectively, so the octahedron is a facial isomer.