Silver, Palladium and Rhodium Complexes of Acenaphthylene‐AnullatedN‐Heterocyclic Carbene Ligands: A Comparative Study
Makaleler > Tam Makale · 2006
Yazarlar: Hayati TÜRKMEN, Onur SAHIN, Orhan BUYUKGUNGOR, BEKİR ÇETİNKAYA
European Journal of Inorganic Chemistry, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2006, cilt 2006, ss 4915-4921
Özet
Abstract 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(I) 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 nonanullated 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. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)