Reactions of alkaline earth metal or al slurries with bis-cyclopentadienyl complexes of some early transition metals

W. E. Lindsell, R. A. Parr

Research output: Contribution to journalArticle

Abstract

Slurries of Mg, Ca, Ba and Al, prepared by cocondensation of metal vapour with volatile organic solvents, especially toluene, at -196°C, reacted at ambient temperature with some bis-cyclopentadienyl complexes of Ti, Zr, Hf, V and Cr. [TiCl2Cp2] (Cp = ?5-C5H5) with slurries Al in hexane or toluene, or Mg or Ba, in toluene, formed [TiClCp2]2 accompanied by side-products. From related reactions with slurries of Mg in tetrahydrofuran (THF), [TiCl2Cp(THF)] was obtained and with Ca-toluene slurries an unstable paramagnetic dihydrido complex of Ti(III) was observed by using ESR spectroscopy. Reactions of [TiPh2Cp2 with slurries of Al or Ba in toluene yielded a form of "titanocene" (TiC10H10) and ESR studies of these reactions revealed related paramagnetic species in solution. Reaction of slurries of Al, Mg or Ba with [TiMe2Cp2] produced several different paramagnetic products which were studied by ESR spectroscopy, and the reaction of metal slurries with the complexes [MR2Cp2] (M = Ti, R = OPh; M = Zr or Hf, R = Cl or Me), [VRCp2] (R = Cl or Me), and [CrCp2] are also reported. © 1986.

Original languageEnglish
Pages (from-to)1259-1265
Number of pages7
JournalPolyhedron
Volume5
Issue number7
Publication statusPublished - 1986

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