Preparation and multinuclear NMR and IR spectroscopic characterization of some complexes of acetyldiphenylphosphine, diphenyl(2-thienyl)phosphine, bis(2-thienyl)phenylphosphine and cyanodiphenylphosphine

Academic Article

Abstract

  • The syntheses and multinuclear NMR and IR spectroscopic characterizations of some mononuclear Mo, Pd and Pt complexes of acetyldiphenylphosphine, diphenyl(2-thienyl)phosphine, bis(2-thienyl)phenylphosphine and cyanodiphenylphosphine are presented. The NMR and IR spectra of the Mo carbonyl complexes indicate that the electron-donor ability of the P substituents increases in the order CN < C(O)Me < 2-thienyl < Ph. The reactions of free and coordinated acetyldiphenylphosphine with amines and borohydrides are reported. These reactions do not lead to the desired imino and hydroxymethyl complexes but rather result in PC bond cleavage. Attempts to form dinuclear complexes with bridging 2-thienylphosphine ligands from mononuclear complexes with P-coordinated ligands have not been successful. The products of the reactions result from ligand exchange between the mononuclear precursors and contain only P-coordinated ligands .The structure suggested for a previously reported homodinuclear complex containing a bridging cyanophenylphosphine ligand, [(CO) Mo(Ph PCN)] , has been confirmed by multinuclear NMR and IR spectroscopic studies. An attempt to form a heterodinuclear MoPt complex with bridging cyanophosphine ligands has not been successful. The products of this reaction result from ligand exchange between the mononuclear precursors. © 1988. 5 2 2
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  • Varshney A; Gray GM
  • Start Page

  • 215
  • End Page

  • 222
  • Volume

  • 148
  • Issue

  • 2