Re-investigation of ortho-metalated N,N-dialkylbenzylamine complexes of rare-earth metals. First structurally characterized arylates of neodymium and gadolinium Li[LnAr4]
作者:Alex R. Petrov、Konstantin A. Rufanov、Klaus Harms、Jörg Sundermeyer
DOI:10.1016/j.jorganchem.2008.12.020
日期:2009.4
solv = THF, DME; n = 1–3 in reactions with ortho-lithiated dimethyl-benzylamine Li(dmba) has been studied. An improved protocol towards homoleptic tris-aryl complexes of the type [Ln(dmba)3], Ln = Y, Er and Yb has been developed and molecular structures of these complexes have been established by X-ray crystallography. For the first time stable homoleptic lithium ate-complexes of the type Li[Ln(dmba)4]
醚配体在[LnCl 3(solv)n ]中的影响,solv = THF,DME; 与邻位锂化的二甲基苄基胺Li(dmba)的反应中,n = 1-3 。已经开发了针对[Ln(dmba)3 ],Ln = Y,Er和Yb类型的均化三芳基配合物的改进方案,并通过X射线晶体学确定了这些配合物的分子结构。首次分离出Li [Ln(dmba)4 ]类型(Ln = Gd,Nd)的稳定的均相锂盐复合物,并对其结构进行了表征。它们合成的成功很大程度上取决于适当的[LnCl 3(solv)n]前体,例如[GdCl 3(dme)2 ],[NdCl 3(dme)]和无THF反应条件。讨论了影响具有dmba型配体的镧系元素三芳基配合物可能降解途径的因素。