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The reaction of anhydrous YbCl3 with 1 equiv, of Li2Me2Si(NPh)2 in THF, after workup, yielded a ytterbium(Ⅲ) chloride [{Me2Si(NPh)2Yb}(μ2-CI)(TMEDA)]2·3PhMe (1) (TMEDA=tetramethylethanediamine). The same reaction followed by treatment with Na-K alloy afforded a new ytterbium(H) complex supported by a bridged diamide with four coordinated LiC1 molecules, [{Me2Si(NPh)2Yb(THF)2}(μ3-CI)(μ4-CI){Li(THF)}2]2·2THF (2) in high yield. Both complexes were structurally characterized by X-ray analysis to be dimers. Complex 1 was a chlorine-bridged dimer with ytterbium in a distorted octahedral geometry. In complex 2 two [Me2Si(NPh)2Yb(THF)2]- (μ3-CI)[Li(THF)]2 moieties were connected with each other by two μ4-CI bridges to form a "chair-form" framework. 相似文献
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设计、合成了2个配合物:{[Co2(pddb)2(μ2-H2O)(H2O)2]·2DMA·5H2O}n(1)和{[Ni2(pddb)2(μ2-H2O)(H2O)2]·2DMA·5H2O}n(2)(H2pddb=3,3''-(吡啶-3,5)二苯甲酸,DMA=N,N-二甲基乙酰胺),并通过红外光谱(IR),元素分析,热重分析(TG)和单晶X射线衍射确定它们的结构。结构分析表明1和2是异质同构的,其空间构型可简化成(3,6)连接的拓扑结构,其符号为(42·6)·(44·62·88·10)。进一步研究了配合物1和2的固体紫外、磁性及其催化性能。研究表明1和2中的中心金属离子之间存在反铁磁耦合作用,并且1可以作为C-H活化的高效非均相催化剂。 相似文献