2-Diphenylphosphino-2′-hydroxybiphenyl-based P-ligands and their platinum(II) complexes

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18 Citations (Scopus)

Abstract

2-Diphenylphosphino-2′-hydroxybiphenyl (2), become readily available via a ring opening reaction of a dibenzo[c.e][1,2]oxaphosphorine, was utilized as P-ligand in complexation with dichlorodibenzonitrile platinum to give a Cl2Pt22 complex (4) with trans geometry. The O-benzyl derivative (5) could not be involved in complexation. A bidentate P-ligand (7) obtained by the interaction of hydroxy-diphenylphosphinobiphenyl 2 with chloro-dibenzo[c.e][1,2]oxaphosphorine (1) formed an 8-ring transition metal complex (Cl2Pt7 = 9) in reaction with PtCl2(PhCN)2. Under the conditions of chromatography, separation of the diastereomers of 7 was not possible due to a partial isomerisation by rotation around the biphenyl axis of the molecule that is justified by the average barrier height of 6.0 kcal/mol. The stereostructure of P-ligands 2 and 7, as well as platinum complexes 4 and 9 was evaluated by B3LYP quantum chemical calculations.

Original languageEnglish
Pages (from-to)5038-5044
Number of pages7
JournalJournal of Organometallic Chemistry
Volume691
Issue number23
DOIs
Publication statusPublished - Nov 15 2006

Keywords

  • Mono and bidentate P-ligands
  • Quantum chemical calculations
  • Stereospecific coupling
  • Stereostructure
  • Transition metal complex

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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