A versatile bulky bidentate ligand for both main group and transition metals. Derivatives of lithium, potassium, magnesium, chromium, manganese, and cobalt containing the C(SiMe3)2(SiMe2C5H4N-2) group

Salih S. Al-Juaid, Colin Eaborn, Peter B. Hitchcock, Michael S. Hill, J. Smith Smith

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The compound HC(SiMe3)2(SiMe2C5H4N-2), 1, reacts with methyllithium in THF to give a good yield of the lithium derivative Li{C(SiMe3)2(SiMe2C5H 4N-2)}, which has been isolated as a molecular THF adduct 2. This reacts (a) with KOtBu to give K{C(SiMe3)2(SiMe2C5H 4N-2)}, 3, which crystallizes in a solvent-free ionic lattice, (b) with MgBr2 to give the Grignard reagent Mg(THF)Br{C(SiMe3)2(SiMe2C5H 4N-2)}, 4, and (c) with CrCl2 to give Cr{C(SiMe3)2(SiMe2C5H 4N-2)}2, 5, along with the halide-bridged Grignard reagent analogue [Cr(μ-Cl)-{C(SiMe3)2(SiMe2C 5H4N-2)}]2·THF, 6, which crystallizes in a lattice containing alternate THF-free molecules (6a) and molecules (6b) with coordinated THF. The reactions of 2 with MnCl2 and CoBr2 give the halide-bridged ate complexes [Li(THF)3(μ-Cl)MnCl{C(SiMe3)2(SiMe 2C5H4N-2)}], 7, and [Li(THF)2(μ-Br)2Co{C(SiMe3) 2(SiMe2C5H4N-2)}], 8, respectively.

Original languageEnglish
Pages (from-to)3224-3231
Number of pages8
Issue number16
Publication statusPublished - 7 Aug 2000

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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