Indenyl- and Fluorenyl-Functionalized N-Heterocyclic Carbene Complexes of Rhodium and Iridium - Synthetic, Structural and Catalytic Studies

Stephen P. Downing, Peter J. Pogorzelec, Andreas A. Danopoulos, David John Cole-Hamilton

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Rhodium. and iridium. complexes with N-heterocyclic carbenes (NHC) functionalized with neutral or anionic indenyl and fluorenyl groups are reported. In the complexes the ligands adopt monodentate, bidentate or bridging bonding modes with the NHC group sigma-bonded and the fluorenyl or indenyl functionalities either dangling or coordinated to the metal with various hapticities (eta(1), eta(3) and eta(5)). Metallation of the C-H bond of the alkylene linker in the ligand has also been observed. Catalytic studies on the bidentate Rh-I complex 6 show that it is weakly active for the hydroformylation of 1-octene with poor linear selectivity, but it shows slightly lower activity than the standard Monsanto system for the carbonylation of methanol. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

Original languageEnglish
Pages (from-to)1816-1824
Number of pages9
JournalEuropean Journal of Inorganic Chemistry
Issue number13
DOIs
Publication statusPublished - May 2009

Keywords

  • N-Heterocyclic carbenes
  • Carbenes
  • Carbene ligands
  • Rhodium
  • Iridium
  • Carbonylation
  • Cyclopentadienyl complexes
  • COORDINATION
  • HYDROFORMYLATION
  • CHIRALITY
  • TITANIUM
  • VANADIUM
  • LIGAND
  • NMR

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