两个含草酸根及硫氰酸根的新型三脚架钴(Ⅱ)配合物的合成、晶体结构及光谱性质(英文)  

Synthesis, Crystal Structures and Spectral Properties of Two New Cobalt Complexes of Tripodal Ligand with Oxalate and Thiocyanate

作　　者：张智慧[1] 陆艳春[1] 杨海龙[1] 汤宇[1] 

机构地区：[1]南开大学化学学院化学系,天津300071

出　　处：《无机化学学报》2005年第4期477-482,共6页Chinese Journal of Inorganic Chemistry

摘　　要：本文合成了两个新型Co髤配合物,[LCo(μ鄄C2O4)CoL]·(ClO4)2·2CH3CN(1)和[CoL(SCN)]·ClO4(2),其中,L即三(3,5鄄二甲基吡唑甲基)胺。在配合物1中,Co与来自三脚架配体的4个氮和草酸根桥联配体的2个氧原子配位,处于扭曲八面体配位环境。由草酸根桥联两套LCo,构成了一个双核结构。在单核配合物2中,Co髤处于三角双锥配位构型,SCN-通过N配位与中心离子Co髤键联。在同一晶胞中有两个构型略微不同的分子,两个分子之间通过SCN的S原子有弱相互作用。对化合物1和2在溶液中的光谱性质做了进一步的研究和讨论。Two novel cobalt complexes, [LCo(mu-oxalate)CoL)center dot(ClO4)(2)center dot 2CH(3)CN (1) and [CoL(SCN)]center dot ClO4 (2) have been synthesized, and their structures have been determined by X-ray crystallography, where L is tris[(3,5-dimethylpyrazol-1-yl)methyl]amine. In compound 1, Co(II) is in a distorted octahedron environment with four nitrogen atoms from the tripodal ligand and two oxygen atoms from the bridged oxalate, and the molecule is a dimmeric structure consisting of two LCo unites linked by bridging oxalate. In the monomer 2, Co(II) center is in trigonal bipyrimad coordination configuration, a thiocyanate group is bonded to the metal center through the nitrogen atom. There are two somewhat different configurations of 2 in the unit cell, and there is a weaker interaction between two molecules of 2 at sulphur atoms. The title complexes were generated by a precursor mononuclear cobalt (H) complex [CoL(N-3)]center dot ClO4 (3). Their spectral properties in solution have been further studied and discussed.

关 键 词：钴(Ⅱ)配合物 三(3 5-二甲基吡唑甲基)胺 草酸根桥联 晶体结构 光谱分析法 

分 类 号：O614.812[理学—无机化学] O641.4[理学—化学]