X-ray crystal structure of the tetra(tert-butyl)erbate anion and attempts to prepare tetravalent organolanthanide complexes
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- 作者：Wontae Noh ; Gregory S. Girolami
- 关键词：Lanthanide ; Organolanthanide ; Crystal structure ; Tetravalent ; Oxidation ; Lithium salt ; Erbium ; Organoerbium ; tert-Butyl
- 刊名：Polyhedron
- 出版年：2007
- 出版时间：31 August 2007
- 年：2007
- 卷：26
- 期：14
- 页码：3865-3870
- 全文大小：281 K
文摘
The new [Li(DME)3+] salt of the previously-known tetra(tert-butyl)erbate(III) anion [Er(t-Bu)4−] has been prepared and structurally characterized. The erbium(III) center is ligated by four tert-butyl groups in an approximately tetrahedral arrangement. The C–Er–C angles between the tert-butyl groups range from 108.8(3)° to 111.2(3)° and the Er–C distances range from 2.352(6) to 2.395(6) Å. The lithium cation is surrounded by three DME molecules, which form a distorted octahedral coordination sphere. Attempts to oxidize the analogous terbate complex [Li(DME)3][Tb(t-Bu)4] and its cerium analog to electrically neutral tetra(alkyl)lanthanide(IV) compounds are described.