Synthesis and ligand exchange reactions of P2Pd(II) and P2Pt(II) salicylaldimates.
Reaction of (dppe)MCl(2)(dppe = 1,2-bis(diphenylphosphino)ethane) with 2-(N-phenyliminomethyl)phenol leads to air-stable (dppe)M(N,O) chelates (M = Pd, 1a; M = Pt, 1b). The N-4-methylphenyl derivative of 1a has been characterized by X-ray analysis. The N,O ligands are kinetically labile and exchange occurs in solution in the presence of other salicylaldimines. In the presence of anilines, a metal-mediated imine exchange process occurs. Hammett analysis reveals that the platinum complexes are sensitive to the electronics at N but not at O. Electron donating groups on the N-aryl ring stabilize the metal complex.
Kerber
William D
WD
Department of Chemistry, University of North Carolina at Chapel Hill, North Carolina 27599-3290, USA.
Nelsen
D Luke
DL
White
Peter S
PS
Gagné
Michel R
MR
D002614:Chelating Agents / Q000138:chemical synthesis; D018360:Crystallography, X-Ray; D007700:Kinetics; D008024:Ligands; D009584:Nitrogen / Q000737:chemistry; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D009943:Organophosphorus Compounds / Q000138:chemical synthesis*; D010100:Oxygen / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D017671:Platinum Compounds / Q000138:chemical synthesis*; D012457:Salicylamides / Q000138:chemical synthesis*
D002614:Chelating Agents; D008024:Ligands; D009942:Organometallic Compounds; D009943:Organophosphorus Compounds; D010636:Phenols; D017671:Platinum Compounds; D012457:Salicylamides; C049078:bis(diphenylphosphine)ethane; D010165:Palladium; D009584:Nitrogen; D010100:Oxygen