稀土与含硫有机配体配合物的研究 I.二乙氨基荒酸稀士配合物Et_2NH_2[RE(S_2CNEt_2)_4]的合成、表征与结构

Studies on the Complexes of Rare Earth with Organic Ligands Containing Sulphur Atoms Ⅰ. Synthesis, Characterization and Structure for Complexes of Rare Earth with Diethyldithiocarbamate Et_2NH_2 [RE(S_2CNEt_2)_4]

在干燥氮气氛中,以乙醇为溶剂制备出稀土与二乙氨基荒酸二乙铵形成的十五个配合物,测定了它们的红外及紫外光谱、热谱和电导,确定该类配合物组成为Et_2NH_2ERE(S_2CNEt_2)_4](RE=La-Lu,Y;Pm除外).镧配合物的X射线结构分析表明,在该配合物中四个二乙氨基荒酸根各通过两个硫原子与镧离子成键,从而形成八配位的十二面体阴离子,并与二乙铵阳离子形成离子缔合型的配合物分子.

The complexes of rare earth with diethylammonium diethyldithiocarbamat(?) Et_2NH-2[RE(S_2CNEt_2)_4] (RE=La to Lu, Y; except Pm) have been synthesized in dry N_2 atmosphere and characterized by elemental analyses, IR and UV spectra, molar conductance, differential thermal analyses (DTA) and thermogravimetric (TG). The structure of the lanthanum complex was determined by X-ray single crystal diflfraction analysis. The results show that La^(3+) is coordinated by eight S atoms belonging to four ligands. The coordination polyhedron can be described as a distorted dodecahedron.