New dicobalt complexes, [CoII2L], with Schiff-base ligands (L1–L4) having two discrete metal chelating sites, which are connected to each other by flexible and rigid linkers, have been synthesized. The complexes were characterized by IR, UV–vis, and mass spectroscopy as well as elemental analyses. A magnetic study indicates an antiferromagnetic interaction in 4. The redox behavior of the complexes was examined by means of cyclic voltammetry compared with those of the corresponding mononuclear complexes. Redox waves, identified to CoIII/CoII and CoII/CoI, were clearly observed. Electro-generated [CoI2L]2− reacts with alkyl halide at each metal center to give an organocobalt complex.
合成了新型双
钴配合物 [CoII2L],其施夫碱
配体 (L1–L4) 具有两个独立的
金属螯合位点,通过柔性和刚性链连接在一起。通过红外光谱、紫外-可见光谱、质谱以及元素分析对这些配合物进行了表征。磁性研究表明在 4 中存在反
铁磁相互作用。通过循环伏安法与相应的一核配合物进行比较,考察了这些配合物的氧化还原行为。明确观察到与 CoIII/CoII 和 CoII/CoI 相对应的氧化还原波。电生成的 [CoI2L]2− 在每个
金属中心与烷基卤化物反应,生成有机
钴配合物。