Anionic ruthenium(II) alkyls with ancillary diene and dienyl ligands: Synthesis and structures of [(η22-C7H8)RuMe4]2- and [(η32-C8H11)RuMe3]2-

Patrick M. Jeffries, Robert E. Ellenwood, Gregory S. Girolami

Research output: Contribution to journalArticle

Abstract

Treatment of the ruthenium(II) diene complexes [(η22-nbd)RuCl2]n or [(η22-cod)RuCl2]n with 4 equiv. of methyllithium in the presence of N,N,N′,N′-tetramethylethylenediamine (tmed) yields the methyl complexes [Li(tmed)]2[(η22-nbd)RuMe4] (1) and [Li(tmed)]2[(η32-C8H11)RuMe3] (2), respectively, where nbd = norbornadiene and cod = 1,5-cyclooctadiene. In the latter compound, the cyclooctadiene ligand has been deprotonated to afford a η32-1,2,3:5,6-cyclooctadienyl group. Both complexes were studied by 1H and 13C{1H} NMR spectroscopy, and the crystal structure of 2 was determined. One lithium atom in 2 is four-coordinate and bridges between one ruthenium-bound methyl group and one of the wingtip allylic carbon atoms in the η32-C8H11 ligand. The other lithium atom is five-coordinate, and forms contacts with the other two Ru-Me groups and with the other wingtip carbon atom of the allyl unit.

Original languageEnglish (US)
Pages (from-to)3165-3170
Number of pages6
JournalInorganica Chimica Acta
Volume361
Issue number11
DOIs
StatePublished - Jul 27 2008

Keywords

  • Alkyl
  • Cyclooctadiene
  • Cyclooctadienyl
  • Methyl
  • Norbornadiene
  • Ruthenium

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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