Synthesis and characterization of two tris-chelate complexes of cobalt(III) with 3,5-dimethyl-1-(N-methyl/ethyl)thiocarbamylpyrazole (HL1, HL2)—biologically important bidentate ligands with one ambidentate donor site
作者:Anil Kumar Barik、Sachindranath Paul、Ray J. Butcher、Susanta Kumar Kar
DOI:10.1016/s0277-5387(00)00523-4
日期:2000.12
Abstract Cobalt(III) complexes, of two potentially pyrazole-derived bidentate ligands (with one ambidentate donor site), 3,5-dimethyl-1-( N -methyl/ethyl)thiocarbamylpyrazole (HL 1 for N -methyl, HL 2 for N -ethyl) have been synthesized and characterized by elemental analyses, IR, UV–Vis and 1 H NMR spectral studies. The structure of Co(L 2 ) 3 has been determined by single-crystal X-ray diffraction
摘要钴(III)络合物,由两个潜在的吡唑衍生的双齿配体(具有一个不明确的供体位点),3,5-二甲基-1-(N-甲基/乙基)硫代氨基甲酰基吡唑(对于N-甲基为HL 1,对于HL 2为HL 2) N-乙基)已经合成,并通过元素分析,IR,UV-Vis和1 H NMR光谱研究进行了表征。Co(L 2)3的结构已经通过单晶X射线衍射研究确定。配合物(三斜空间群P 1)具有扭曲的八面体结构,其无配位配位体通过吡唑环氮(叔)和硫代氨基甲酰基亚氨基氮原子与Co(III)离子配位作为单价二齿螯合剂。规则八面体几何形状的变形归因于平面二齿配体施加的立体化学限制。