Four-and five-co-ordinate lanthanide (II) aryloxides: X-ray structures of the bis(2,6-di-t-butyl-4-methylphenoxo)ytterbium(II) complexes [Yb(OAr) 2(L)2] and [Yb(OAr)2(L′)3] [Ar=C6H2But2-2,6-Me-4, L = tetrahydrofuran (thf) or OEt2, L′ = thf]

Glen B. Deacon, Peter B. Hitchcock, Stephen A. Holmes, Michael F. Lappert, Peter MacKinnon, Russell H. Newnham

Research output: Contribution to journalArticleResearchpeer-review

83 Citations (Scopus)


General methods for the preparation of hydrocarbon-soluble, monomeric ytterbium (II) aryloxides are described {Yb+2TIOAr, or [Yb(NR2) 2(OEt2)2]+2ArOH;R=SiMe3, Ar=C 6H2But2-2,6-Me-4; crystalline [Yb(OAr)2(thf)3] (thf = tetrahydrofuran) (1) has the unprecedented square-pyramidal YbII stereochemistry (one thf apical), whereas the complexes [Yb(Oar)2(L)2] [L = thf (2) or OEt2 (3)] are tetrahedral, with 〈Yb-OAr〉 2.207 (12) (1), 2.137(10) (2), or 2.154(28) Å (3); complex (3) with thf readily yields (1) or (2)}.

Original languageEnglish
Pages (from-to)935-937
Number of pages3
JournalJournal of the Chemical Society, Chemical Communications
Issue number14
Publication statusPublished - 1989

Cite this