Synthesis and characterization of the trihalophosphine compounds of ruthenium [RuX2(η6-cymene)(PY3)] (X = Cl, Br, Y = F, Cl, Br) and the related PF2(NMe2) and P(NMe2)3 compounds; multinuclear NMR spectroscopy and the X-ray single crystal structures of [RuBr2(η6-cymene) (PF3)]...