Steric Modulation of Coordination Number and Reactivity in the Synthesis of Lanthanoid(III) Formamidinates
作者:Marcus L. Cole、Glen B. Deacon、Craig M. Forsyth、Peter C. Junk、Kristina Konstas、Jun Wang
DOI:10.1002/chem.200700963
日期:2007.10.5
Reactions of a range of the readily prepared and sterically tunable N,N'-bis(aryl)formamidines with lanthanoid metals and bis(pentafluorophenyl)mercury (Hg(C6F5)2) in THF have given an extensive series of tris(formamidinato)lanthanoid(III) complexes, [Ln(Form)3(thf)n], namely [La(o-TolForm)3(thf)2], [Er(o-TolForm)3(thf)], [La(XylForm)3(thf)], [Sm(XylForm)3], [Ln(MesForm)3] (Ln=La, Nd, Sm and Yb), [Ln(EtForm)3]
一系列易于制备且空间可调的N,N'-双(芳基)甲am与镧系金属和双(五氟苯基)汞(Hg(C6F5)2)在THF中的反应产生了一系列的三(甲酰胺基)镧系元素(III)配合物[Ln(Form)3(thf)n],即[La(o-TolForm)3(thf)2],[Er(o-TolForm)3(thf)],[La(XylForm) 3(thf)],[Sm(XylForm)3],[Ln(MesForm)3](Ln = La,Nd,Sm和Yb),[Ln(EtForm)3](Ln = La,Nd,Sm,Ho和Yb)和[Ln(o-PhPhForm)3](Ln = La,Nd,Sm和Er)。[有关使用的N,N'-双(芳基)甲酰胺基缩写的解释,请参见方案1。]类似尝试通过这种方法制备[Yb(o-TolForm)3]的结果总是[[Yb(o-TolForm)2] (mu-OH)(thf)} 2],但[Yb(o-To