Synthesis and Magnetic Properties of Oligonuclear Metal Complexes

为了开发新的寡核金属配合物，一些多齿、大环和羧基配体被用来合成此类化合物。合成了四种含NNS给电子体的硫醇配体的线状、环状三核金属配合物和链状配合物，并分离得到了异质三核配合物。合成了一种新的NNSS供体硫醇配体，合成了金刚烷型四核配合物。通过五齿配体与不同的金属盐反应，合成了四核、五核、六核和八核配合物。这些络合物的磁性是反铁磁性的。大环配体形成了双核和四核配合物。金属羧酸盐二聚体被检测为寡核或多核形成的构建块。在大多数情况下，会形成链状络合物。发现苯甲酸铜(II)链状络合物具有微孔结构。铜(II)羧酸盐的处理导致了具有交替的Mu-羧基和Mu-烷氧基桥的四核和六核配合物。

Aiming at developing new oligonuclear metal complexes, some multidentate, macrocyclic, and carboxylato ligands were utilized for producing such compounds. Linear and cyclic trinuclear metal complexes as well as chain complexes were synthesized by the use of four kinds of thiolic ligands having NNS-donor sets.Heterometal trinuclear complexes were also isolated. A new NNSS-donor thiolic ligand was synthsized to give adamantane-like tetranuclear complexes. Tetranuclear, pentanuclear, hexanuclear, and octanuclear complexes were synthesized by reaction of pentadentate ligands with various metal salts. Magnetic properties of these complexes are antiferromagnetic. Macrocyclic ligands afforded dinuclear and tetranuclear complexes. Metal carboxylate dimers were examined as building blocks for oligonuclear or polynuclear formation. In most cases, chain complexes were formed. A microporous structure was found in chain complex of copper(II) benzoate. Treatment of copper(II) carboxylates led to tetranuclear and hexanuclear complexes with alternating mu-carboxylato- and mu-alkoxo-bridges.