Three-coordinate bis(phosphinimino)methanide derivatives of 'open shell' [M(II)] (M = Mn, Fe, Co) transition metals

Michael S. Hill, Peter B. Hitchcock

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25 Citations (Scopus)

Abstract

An alternative two-step synthesis of the previously reported bis(diphenylphosphinimino)methane [CH2(Ph2P = NC6H3iPr2-2.6)2] involving bromine oxidation of dppm and metathesis with 2,6-diisopropylaniline is described. [CH2(Ph2P NC6H3iPr2-2,6)2] is readily deprotonated by the transition metal silylamides [M{N(SiMe3)2}2] (M = Mn, Fe and Co) to provide a series of exclusively three-coordinate derivatives [{CH(Ph2PNC6H3i Pr2-2,6)2M{N(SiMe3)2}] which have been characterised by elemental analysis, magnetic measurements and, in the case of the Fe derivative, X-ray structural analysis. Reactivity studies have shown that even such sterically demanding bis(phosphinimino)methanide ligands are prone to protonolysis and reductive [P(V) to P(III)] degradation which limits their utility as stable platforms for further M(II) derivitisation.

Original languageEnglish
Pages (from-to)3163-3167
Number of pages5
JournalJournal of Organometallic Chemistry
Volume689
Issue number20
DOIs
Publication statusPublished - 29 Sep 2004

Keywords

  • Amides
  • Cobalt
  • Iron
  • Manganese
  • Three-coordinate

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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