4-COORDINATE LANTHANIDE DI-ISOPROPYLAMIDES - [LI(THF)LN(N(I)PR2)(4)] (LN=LA, Y, YB)

被引：26

作者：

ASPINALL, HC

TILLOTSON, MR

机构：

[1] Department of Chemistry, University of Liverpool, Liverpool, L69 3BX

来源：

POLYHEDRON | 1994年 / 13卷 / 23期

关键词：

D O I：

10.1016/S0277-5387(00)83385-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In the presence of excess (LiNPr2)-Pr-i, lanthanide tris(di-isopropylamides) Ln((NPr2)-Pr-i)(3) form bimetallic complexes [Li(THF)Ln((NPr2)-Pr-i)(4)], which are common impurities in the synthesis of [Ln((NPr2)-Pr-i)(3)(THF)]. NMR studies show that:. at room temperature [Li(THF)Ln((NPr2)-Pr-i)(4)] consists of a tetrahedral array of four equivalent (NPr2)-Pr-i, hands on Ln, with the Li(THF) moiety migrating rapidly between them. At 223 K, a bimetallic structure [(THF)Li(mu-(NPr2)-Pr-i)(2)Ln((NPr2)-Pr-i)(2)] is frozen out. [Ln((NPr2)-Pr-i)(3)(THF)] may be synthesized free of [Li(THF)Ln((NPr2)-Pr-i)(4)] impurity by reaction of LnCl(3) with 2.5 equivalents of (LiNPr2)-Pr-i.

引用

页码：3229 / 3234

页数：6

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