Octahedral ruthenium(II) complexes containing the chiral ligand (4S)-2-[(S_p)-2-(diphenylphosphino)ferrocenyl]-4-(isopropyl)oxazoline (FcPN). X-Ray crystal strucutres of fac-[RuCl_2(PMe_3)_2(FcPN)] and Fac-[RuCl_2(dppm)(FcPN)] (dppm = bis(diphenylpho

摘要

Octahedral ruthenium(II) complexes containing the chiral ligand (4S)-2-[(S_p)-2-(diphenylphosphino)ferrocenyl]-4-(isopropyl)oxazoline (FcPN) have been prepared from complex [RuCl_2(PPh_3)(FcPH)] (1) via phosphine exchange reactions. Complex 1 reacts with PMe_3, PMe_2Ph, bis(diphenylphosphino)methane (dppm) and 1,2-bis(diphenylphosphino)ethane (dppe) affording in good yield the complexes [RuCl_2L_2(FcPH)] (L = PMe_3 (2a), PMe_2Ph (2b)) and [RuCl_2(L-L)(FcPN)](L-L = dppm (3a), dppe (4)). The processes are stereoselective giving rise to the thermodynamically stable fac isomers. The kinetically controlled formation of the mer isomer [RuCl_2(dppm)(FcPN)] (3b) is also described. Structural characterization of the complexes has been carried out by means of ~1H-, ~(31)P{~1H}- and ~(13)C{~1H}-NMR spectroscopy and the crystal structures of the complexes 2a and 3a have been determined by X-ray diffraction methods.