om0205344_si_001.cif (47.08 kB)

Formation of Ruthenium(II)−Bis(phosphine) Monoxide Complexes from the Bis(phosphine) Precursors:  BINAP-Monoxide (BINAPO) as a Six-Electron (P,O2- Naphthyl) Donor

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posted on 02.10.2002, 00:00 by Paul W. Cyr, Steven J. Rettig, Brian O. Patrick, Brian R. James
Aerobic oxidation of one P atom in cis-RuCl2(P−P)(L2) complexes (P−P = (R)-BINAP (2,2‘-bis(diphenylphosphino)-1,1‘-binaphthyl) or dppb (1,4-bis(diphenylphosphino)butane), L2 = bipy (2,2‘-bipyridine) or phen (1,10-phenanthroline)) generates species such as [RuCl(BINAPO)(L2)]PF6 and cis-RuCl2(dppbO)(L2) containing the corresponding bis(phosphine) monoxide ligands [BINAPO = 2-(diphenylphosphinoyl)-2‘-(diphenylphosphino)-1,1‘-(binaphthyl), and dppbO = 1-(diphenylphosphinoyl)-4-(diphenylphosphino)butane)]. A novel coordination mode of BINAPO, involving the PIII atom, the O atom, and an η2-naphthyl interaction proximate to the oxidized P atom, is identified by X-ray crystallography.