Isolation and Characterization of the First σ-Organomanganese(III) Complex. Crystal and Molecular Structure of (2,4,6-Trlmethylphenyl)-dlbromobls(trlmethylphosphlne)manganese(III)

Robert J. Morris, Gregory S. Girolami

Research output: Contribution to journalArticlepeer-review

Abstract

Alkylation of MnBr2with the mesityl (2,4,6-trimethylphenyl) reagent Mg(C6H2Me3)2(THF)2in the presence of trimethylphosphine followed by reaction with 1 equiv of oxygen yields dark red crystals of Mn-(C6H2Me3)Br2(PMe3)2, which is the first isolated example of a σr-organomanganese(III) complex. This high-spin (μ = μB)complex adopts a distorted trigonal-bipyramidal structure of approximate C2vsymmetry with the phosphine ligands occupying the axial sites. The metal-ligand distances are consistent with a trivalent oxidation state, while the orientation of the mesityl ring in the equatorial plane and the interligand angles can be rationalized on steric grounds.

Original languageEnglish (US)
Pages (from-to)1815-1816
Number of pages2
JournalOrganometallics
Volume6
Issue number8
DOIs
StatePublished - Aug 1 1987

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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