Lanthanide tri-benzyl complexes: structural variations and useful precursors to phosphorus-stabilised lanthanide carbenes
作者:Ashley J. Wooles、David P. Mills、William Lewis、Alexander J. Blake、Stephen T. Liddle
DOI:10.1039/b911717b
日期:——
Reaction of [Ln(I)3(THF)4] (Ln = Ce, Pr) or [Ln(I)3(THF)3.5] (Ln = Nd, Sm, Gd, Dy, Er) with three equivalents of [KBz] (Bz = CH2C6H5) at 0 °C afforded the corresponding lanthanide tri-benzyl complexes [Ln(Bz)3(THF)3] [Ln = Ce (2), Pr (3), Nd (4), Sm (5), Gd (6), Dy (7), Er (8) La (11)] in 48–75% crystalline yields, with the exception of the redox active samarium complex, which was isolated in poor
[的反应Ln(I)3(四氢呋喃)4](Ln = 铈, 镨) 或者 [Ln(I)3(四氢呋喃)3.5](Ln = 钕, m, d, 镝, 尔)在0°C时具有三当量的[KBz](Bz = CH 2 C 6 H 5),得到相应的镧系元素三苄基配合物[Ln(Bz)3(THF)3] [Ln = 铈(2),镨(3),钕(4),m(5),d(6),镝(7),尔(8)啦啦(11)]的结晶产率为48–75%,氧化还原活性物质除外钐复合物,分离出来的收率很低(20%)。发现复合体2-8采用扭曲的八面体几何形状,其中Bz和四氢呋喃基团结合在一个相互FAC在固体状态的方式。虽然该系列是结构上相似的,三种结构类型的分类可以镧系收缩的基础上进行:(ⅰ)其表现出3η络合物2 LN⋯ç IPSO触点(1-4,11); (II)配合物,其示出了一个η 2 LN⋯Ç本位接触(5); (iii)没有多原点相互作用的复合物(6-8)。为了镱,混合价,