Octahedral ruthenium(II) complexes containing the chiral ligand (4S)-2-[(Sp)-2-(diphenylphosphino)ferrocenyl]-4-(isopropyl)oxazoline (FcPN). X-Ray crystal structures of fac-[RuCl2(PMe3)2(FcPN)] and fac-[RuCl2(dppm)(FcPN)] (dppm = bis(diphenylphosphino)methane)