Silver, palladium and rhodium complexes of acenaphthylene-anuilated N-heterocyclic carbene ligands: A comparative study


Turkmen H. , SAHIN O., BUYUKGUNGOR O., CETINKAYA B.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, ss.4915-4921, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Basım Tarihi: 2006
  • Doi Numarası: 10.1002/ejic.200600545
  • Dergi Adı: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
  • Sayfa Sayıları: ss.4915-4921

Özet

The newly prepared carbene precursor 1,3-dimesitylacenaphtho[1,2-d]imidazolinium chloride, (NHC-H)Cl, 3, could be readily converted into the NHC-silver(l) complex, 4, which is an efficient carbene transfer agent and has been used to synthesise thione 5, trans-[PdCl2(NHC)(2)], 6 and [RhCl(NHC)(COD)], 7. All compounds synthesised were characterised by elemental analysis, NMR spectroscopy and the molecular structures of the thione 5 and complex 7 were determined by X-ray crystallography. Complex 7 was converted into cis-[RhCl(NHC)(CO)(2)] and the electron donating properties and trans influence of the NHC ligand were compared with nonamillated counterparts. The catalytic activity in the Heck reaction of 6 and the in situ formed palladium complex was evaluated. The activity of the in situ formed complexes for the Heck coupling of alkenes was high. (c) Wiley-VCH Verlag GmbH & Co.