Jump to main content
Jump to site search

Issue 36, 2017
Previous Article Next Article

A convenient access to N-phosphonio-substituted NHC metal complexes [M = Ag(I), Rh(I), Pd(II)]

Author affiliations

Abstract

A series of NHC pre-ligands featuring a pendant phosphonium moiety attached to N′ position through a propyl linker was readily obtained upon quaternization of N-mesityl- and N-methyl-imidazole, or N-mesityl-imidazoline using (3-bromo-propyl)-triphenylphosphonium bromide. Reactions of the resulting dicationic salts with [PdCl(allyl)]2 in the presence of K2CO3 afforded the anticipated NHC-ligated Pd(II) metal complexes in high yields. Further treatment of the latter complexes with tBuOK induced a deprotonation of the carbon atom adjacent to the phosphonium moiety and the formation of the corresponding C,C-chelating NHC-phosphonium ylide Pd(II) complexes. Investigation of an alternative synthetic route involving a silver transmetallation reaction incidentally allowed isolation and full characterization of an unusual dimeric tetranuclear NHC Ag(I) complex of general formula [(NHC∼P+)2(Ag4Br6)2−].

Graphical abstract: A convenient access to N-phosphonio-substituted NHC metal complexes [M = Ag(i), Rh(i), Pd(ii)]

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Jul 2017, accepted on 01 Sep 2017 and first published on 04 Sep 2017


Article type: Paper
DOI: 10.1039/C7DT02759A
Citation: Dalton Trans., 2017,46, 12293-12305
  •   Request permissions

    A convenient access to N-phosphonio-substituted NHC metal complexes [M = Ag(I), Rh(I), Pd(II)]

    I. Benaissa, R. Taakili, N. Lugan and Y. Canac, Dalton Trans., 2017, 46, 12293
    DOI: 10.1039/C7DT02759A

Search articles by author

Spotlight

Advertisements