Cyclometallated platinum(II) complexes containing the chiral ligand [2-(diphenyl-phosphanyl)-benzylidene]-(1-phenyl-ethyl)-amine: Synthesis and molecular structures of the compounds [PtCl(Me){κ2-(R)-Ph2P(C6H4)CHdouble bond; length as m-dashNCH(Ph)Me-P,N}]

Diastoreoisomeric mixtures of the complex [PtIMe3{κ2-Ph2P(C6H4)CHdouble bond; length as m-dashNCH(Ph)Me-P,N}] (Rc-1) react with AgBF4 and SMePh to give a mixture of complexes [PtMe(SMePh){κ2-Ph2P(C6H4)CHdouble bond; length as m-dashNCH(Ph)Me-P,N}]BF4 (2) and [Pt{κ3-Ph2P(C6H4)CHdouble bond; length as m-dashNCH(C6H4)Me-P,N,C}(PhSMe)]BF4 (3) which subsequently render the corresponding chloride compounds [PtClMe{κ2-(R)-Ph2P(C6H4)CHdouble bond; length as m-dashNCH(Ph)Me-P,N}] (4) and [PtCl{κ3-(R)-Ph2P(C6H4)CHdouble bond; length as m-dashNCH(C6H4)Me-P,N,C}] (5), by elution with CH2Cl2 on a aluminium oxide chromatography column. Refluxing of [PtIMe3{κ2-Ph2P(C6H4)CHdouble bond; length as m-dashNC∗H(Ph)Me-P,N}] (Sc-1) with AgBF4 in a 1:1, CH2Cl2:Me2CO mixture followed by the addition of SMePh, NCMe or pyridine (Py) affords the corresponding cyclometallated compounds [Pt{κ3-(S)-Ph2P(C6H4)CHdouble bond; length as m-dashNCH(C6H4)Me-P,N,C}(L)]BF4 [L = SMePh (3), NCMe (9), Py (10)]. These compounds have been characterised by analytical and spectroscopic means and by the molecular structure determination of complexes 4 and 10.