179548-65-3Relevant academic research and scientific papers
Orthopalladation of phosphorus ylides in endo position with bidentate ligands
Karami, Kazem,Rizzoli, Corrado,Borzooie, Farzaneh
experimental part, p. 778 - 784 (2011/04/16)
The ortho-metallated complexes [Pd2{κ2(C,C)- C6H4(PPh2CHC(O)C6H 5R}2(μ-Cl)2] (R = Ph (1a), NO2 (1b), Br (1c)) were prepared by refluxing equimolar mixtures of Ph 3PCHC(O)C6H5R, (R = Ph, NO2, Br) and Pd(OAc)2 in MeOH, followed by an excess of NaCl. The dinuclear complexes (1a-1c) react with silver trifluoromethylsulfonate and bidentate ligands [L = bipy (2,2′-bipyridine), phen (phenanthroline), dppe (bis(diphenylphosphino)ethane), dppp (bis(diphenylphosphino)propane)] giving the mononuclear stabilized orthopalladated complexes in endo position [Pd{κ2(C,C)-C6H4(PPh2CHC(O)R} L](OTf) [R = Ph, L = phen (2a), bipy (3a), dppe (4a), dppp (5a); R = NO 2, L = phen (2b), bipy (3b), dppe (4b), dppp (5b); R = Br, L = phen (2c), bipy (3c), dppe (4c), dppp (5c); OTf = trifluoromethylsulfonate anion]. Orthometalation and ylidic C-coordination are demonstrated by an X-ray diffraction study of 2c and 3c. In the structures, the palladium atom shows a slightly distorted square-planar coordination geometry.
