SEARCH

SEARCH BY CITATION

Keywords:

  • Gold;
  • Palladium;
  • Platinum;
  • Metalation;
  • Chelates

Abstract

A set of organogold(I) compounds L1–4Au(PPh3), where L1 = [o-C6H4(CH=NC6H3iPr2-2,6)] (1), L2 = {o,o-C6H3[C(Me)=NC6H3Me2-2,6]2} (2), L3 = [o,o′-C6H3(CH2OMe)(CH2NMe2)] (3), L4 = [o,o-C6H3(CH2OMe)2] (4), were synthesized by the reaction of parent organolithium derivatives L1–4Li with [AuCl(PPh3)] in good yields. The molecular structures of 14 were characterized by ESI mass spectrometry and 1H NMR, 13C NMR and 31P NMR spectroscopy, and their structures in the solid state were determined using single-crystal X-ray diffraction analyses. The transmetalation potential of 14 was tested by the reaction with either [PdCl2(CH3CN)2] or [PtCl2(Et2S)2] complexes. While the reaction of compounds 1 and 2 proceeded smoothly with the formation of the desired transition-metal complexes, i.e. (L1PdCl)2 (5), L1PtCl(Et2S) (6) and L2MCl [M = Pd (7) or Pt (8). In the case of the O,C,N- and O,C,O-chelated derivatives 3 and 4 only the platinum(II) compounds L3PtCl(PPh3) (9) and L4PtCl(Et2S)2 (10) could be isolated after the reaction, as a result of the labile behaviour of the corresponding palladium compounds. All derivatives 510 were characterized by the help of ESI mass spectrometry and 1H NMR, 13C NMR and 31P NMR spectroscopy, and in the case of compounds 57 and 9 using single-crystal X-ray diffraction analyses.