冠醚同过渡金属的配合物研究——硝酸钴(Ⅱ)与18-冠-6配合物的合成、性质及晶体结构

Study on Complexes of Transition Metals with Crown Ethers Synthesis,Properties and Structure Crystal of 18-Crown-6 with Cobalt(Ⅱ)Nitrate

本文在乙醇溶液中合成了结构为[CO(NO_3)(H_2O_5)]^+·(NO_3^-)(18-C-6)(H_2O)的粉红色晶状配合物.用元素分析、电导测定、 紫外可见光谱、红外光谱及热分析等方法对该化合物进行了研究.并由 X-射线单晶结构分析确定,该化合物晶体属单斜晶系,空间群 p21/n.晶胞参数 a=7.258(1),b=16.149(2),c=20.825(3)(?),β=99.15(3)°,V=2409.8(?)~3,Z=4.结果表明.Co^(2+)与5个水及一个硝酸根上的氧原子配位,形成稍有畸变的八面体配位构型.18-冠-6的氧原子未直接向钴配位,而是通过氢键与配位水相联系.

This paper reports the synthesis,properties and crystal structure oftitle compound[(Co(Co(NO_3).(H_2O)_5)]^+.(NO_3^-).(H_2O).(18-c-6).The com-pound has been studied by element analysis,conductivity determination,DSC-TG,UV and IR spectra.The structure of the single crystal has beendetermined by X-Ray diffraction.The crystal belongs to the mcncclinicsystem and the space group is P_(21)/rn with lattice parameters are a=7.258(1),b=16.149(2),c=20.825(3)(?),β=99.15(3)°,V=2409.8(?).z=4.Theresults show.Cobalt(Ⅱ)coordinates with five water molecules and anoxygen of nitrate group,and leads to the octahedral coordination confi-guration which is distorted slightly.The oxygens of 18-C-6 are not direc-tly coordinated to the Cobalt(Ⅱ)but connected to the coordinated watermolecules by hydrogen bonds.