A cobalt(Ⅱ)complex,trans-[CoL2(H2O)2](ClO4)2· 2C2H5OH,(L=3-(p-methoxyphenyl)-4-(p-bromophenyl)-5-(2-pyridyl)-1,2,4-triazole),was synthesized and characterized by FT-IR,ESI-MS,TGA and X-ray crystallography.The complex crystallizes in monoclinic system with space group P21,a=0.8763(5)nm,b=3.3844(18)nm,c=0.9203(5)nm,β=102.961(8)°,V=2.660(2)nm3,Z=2 with final R=0.0644.The cobalt atom lies in a distorted octahedral environment with two water molecules in the trans positions.The ligand L coordinates via one triazole nitrogen and pyridine nitrogen atom.The triazole-pyridyl dihedral angle in the complex is larger than that in the free L ligand.The TG analysis shows that the complex is stable below 345 ℃.CCDC:859546.%以3-对甲氧基苯基-4-对溴苯基-5-(2-吡啶基)-1,2,4-三氮唑(L)作为配体,合成了1个钴配合物[CoL2(H2O)2](ClO4)2· 2C2H5OH,对其进行了红外、电喷雾质谱、热重分析和单晶结构表征,该配合物属于单斜晶系,空间群P21,a=0.8763(5)nm,b=3.3844(18)nm,c=0.9203(5)nm,β=102.961(8)°,V=2.660(2)nm3,Z=2,R1=0.0644.单晶结构表明,钴离子处于1个扭曲的八面体配位环境中,2个水分子呈反式配位,每个配体L通过三氮唑上的1个氮原子和吡啶氮原子参与配位.配体配位后三氮唑-吡啶间二面角反而变大.热重分析表明该配合物在345℃开始发生分解.
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