Trimethylsilylcyclopentadienylthallium(I) complexes: syntheses and X-ray structures of the multidecker sandwich complexes [Tl(μ-η:η-C5H4SiMe3)]n and [Tl{μ-η:η-C5H3(SiMe3)2-1,3}]6 (a "doughnut" molecule)

Stephen Harvey, Colin L. Raston, Brian W. Skelton, Allan H. White, Michael F. Lappert, Ghanshyam Srivastava

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Abstract

Crystalline trimethylsilylcyclopentadienylthallium(I) complexes [Tl(μ-η : η-C5H3RR′)]n [I: R SiMe3, R′ H, n ∞; II: R SiMe3 R′, n 6) are obtained in high yield from TlOEt and C5H4RR′ in C6H6 at ca. 20°C; single crystal X-ray data reveal I to be a chain polymer and II a cyclic hexamer (Tl atoms at the vertices of a regular hexagon), with TlC(cent) (C(cent) = centroid of C5 ring) 2.71 and 2.84 Å for I and 2.74-2.78 Å for II. C(cent)TlC(cent) 149° for I and 127-133° for II, and TlC(cent)Tl 178° for I and 169-173° for II.

Original languageEnglish
Pages (from-to)C1-c6
JournalJOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume328
Issue number1-2
DOIs
Publication statusPublished - 14 Jul 1987
Externally publishedYes

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