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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >2,2′-Bipyridine-1,2-dithiolate mixed ligand complexes. Synthesis, characterisation and EPR spectroscopy
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2,2′-Bipyridine-1,2-dithiolate mixed ligand complexes. Synthesis, characterisation and EPR spectroscopy

机译:2,2'-联吡啶-1,2-二硫醇盐混合的配体复合物。合成,表征和EPR光谱

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摘要

A series of new 2,2′-bipyridine/1,2-dithiolate transition metal complexes has been synthesised and characterised. As 1,2-dithiolate ligands 1,2-dithiooxalate (dto) and 1,2-dithiosquarate (dtsq) were used. It follows from the IR spectra that the multidentate dithiolate ligands coordinate exclusively via their sulfur atoms forming anMN_2S_2 coordination sphere. The central metal ions (M) are Cu~(2+), Ni~(2+), Pd ~(2+), Pt~(2+), and Zn~(2+). The complex Cu ~(II)(bpy)(dto)) could be studied by EPR spectroscopy and was measured as powder, diamagnetically diluted in the isostructural Ni~(II)(bpy) (dto)) host structure. The spin density contribution calculated from the experimental parameters is compared with the electronic situation in the frontier orbitals, namely in the semi-occupied SOMO of the copper complex, derived from quantum chemical calculations on different levels (EHT and DFT).
机译:合成并表征了一系列新的2,2'-联吡啶/ 1,2-二硫醇盐过渡金属配合物。作为1,2-二硫代酸酯的配体,使用1,2-二硫代草酸酯(dto)和1,2-二硫代方酸酯(dtsq)。从IR光谱得出,多齿二硫醇盐配体仅通过其硫原子配位而形成MN_2S_2配位球。中心金属离子(M)为Cu〜(2 +),Ni〜(2 +),Pd〜(2 +),Pt〜(2+)和Zn〜(2+)。可以通过EPR光谱研究复杂的Cu〜(II)(bpy)(dto)),并以粉末形式测量,并在同构Ni〜(II)(bpy)(dto))主体结构中反磁性稀释。将根据实验参数计算出的自旋密度贡献与边界轨道(即铜配合物的半占领SOMO)中的电子情况相比较,该电子情况来自不同水平(EHT和DFT)的量子化学计算。

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