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)CHNCH(Ph)Me-P,N}] and [Pt{κ3-(S)-Ph2P(C6H4)C

Diastoreoisomeric mixture of [PtIMe3{κ2-(R)-Ph2P(C6H4)CHNCH(Ph)Me-P,N}] react with AgBF4 and SMePh to give a mixture of complexes [PtMe(SMePh){κ2-(R)-Ph2P(C6H4)CHNCH(Ph)Me-P,N}]BF4 and [Pt{κ3-(R)-Ph2P(C6H4)CHNCH(C6H4)Me-P,N,C}(SMePh)]BF4. The attempts to separate this mixture by column chromatography on aluminium oxide yields the corresponding chloride compounds [PtClMe{κ2-Ph2P(C6H4)CHNCH(Ph)Me-P,N}] and [PtCl{κ3-Ph2P(C6H4)CHNCH(C6H4)Me-P,N,C}] by elution with CH2Cl2. Refluxing of [PtIMe3{κ2-(S)-Ph2P(C6H4)CHNCH(Ph)Me-P,N}] with AgBF4 in a CH2Cl2:Me2CO mixture followed by the addition of L (SMePh, NCMe, Py) affords the corresponding cyclometallated compounds [Pt{κ3-(S)-Ph2P(C6H4)CHNCH(C6H4)Me-P,N,C}(L)]BF4.