Abstract
Deprotonation of the terminal amino group in the N-thiophosphoryl compounds Me 2P(S)NC(NH 2) 2 (HL 1), Ph 2P(S)NC(Me)NH 2 (HL 2) or Ph 2P(S)NC(NH 2) 2 (HL 3) using potassium tert butoxide in thf, followed by treatment with cis-[PtCl 2(PR 3) 2] (PR 3=PMe 2Ph or 1 2 dppe) generates monocationic complexes cis-[Pt(L n - S,N)(PR 3) 2]Cl ( 1– 6), which have been characterised by 31P{ 1H} NMR, IR and FAB + mass spectroscopies, and for cis-[Pt(L 2- S,N)(PMe 2Ph) 2]Cl ( 2) by single crystal X-ray diffraction. The molecular structure of 2 reveals bidentate coordination of the platinum(II) centre by a bidentate S,N-chelating [Ph 2P(S)NC(Me)NH] − anion, giving a six-membered platinacycle, which adopts a chaise-longue conformation, with a strong hydrogen-bonding interaction between the chloride counterion and the nitrogen-bound proton.
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