Abnormally bound N-heterocyclic carbene complexes of ruthenium: C-H activation of both C4 and C5 positions in the same ligand

Charles E Ellul, Mary F Mahon, Olly Saker, Michael K Whittlesey

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)

Abstract

Abnormal carbene ligand formation from a free monodentate N-heterocyclic carbene, 1,3-di-tert-butyl-2-imidazolylidene occurs by coordination of the ruthenium centers to C4-position, rather than via C2-atom. Reaction of Ru3(CO)12 with free imidazolylidene 1,3-tBu2C3H2N2 gave [(1,3-tBu2C3H2N2-kC4)(CO)3Ru[Ru(CO)4]2] (1), having C2-position protonated, which undergoes thermal rearrangement and C5-H-activation at 50-70 Deg yielding [(micro -1,3-tBu2C3HN2-kC4:kC5)(micro -H)Ru3(CO)9] (2). Crystal structures of 1 and 2 are reported.
Original languageEnglish
Pages (from-to)6343-6345
Number of pages3
JournalAngewandte Chemie-International Edition
Volume46
Issue number33
Publication statusPublished - 2007

Keywords

  • imidazolylidenes
  • imidazolylidene hydro bridging ligand triruthenium nonacarbonyl cluster prepn structure
  • PREP (Preparation) (bridging
  • complexes
  • ruthenium complexes
  • Ligands Role
  • thermal rearrangement and C-H-bond activation of abnormally bound and bridging imidazolylidene triruthenium complexes)
  • Transition metal complexes Role
  • Molecular structure (of abnormally bound and bridging imidazolylidene triruthenium carbonyl complexes)
  • bond carbon hydrogen activation imidazolylidene ruthenium complex
  • ruthenium carbonyl cluster imidazolylidene abnormal activation metalation trinuclear complex
  • five-membered
  • Crystal structure
  • crystal structure ruthenium carbonyl cluster abnormal bound imidazolylidene
  • Metalation (prepn.
  • Carbonyl complexes Role
  • activation
  • mol structure ruthenium carbonyl cluster abnormal bound imidazolylidene
  • structure
  • RACT (Reactant or reagent) (ruthenium
  • RACT (Reactant or reagent) (carbene complexes
  • PRP (Properties)
  • RCT (Reactant)
  • PREP (Preparation)
  • prepn.
  • RACT (Reactant or reagent) (transition metal complexes
  • RACT (Reactant or reagent) (nitrogen
  • Heterocyclic compounds Role
  • Carbene complexes Role
  • ruthenium
  • Bond (carbon-hydrogen
  • SPN (Synthetic preparation)

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