Rational synthesis of metalla–sulphur–nitrogen complexes: use of [Me2SnS2N2]2 in the preparation of complexes of the type [M(S2N2H)(PR3)2]X(M = Pt or Pd). X-Ray structures of [Pt(S2N2H)(PEt3)2][Me2SnCl3],[Pt(S2N2H)(PBun3)2]2[PF6]Cl, and [{Co(S2N2H)2}2{Ph2P(O)CH2CH2P(O)Ph2}]

Abstract

Reaction of (Me₂SnS₂N₂)₂ with cis-[MCl₂(PR₃)₂](M = Pt, PR₃= PMe₃, PEt₃, PPrⁿ₃, PBuⁿ₃,PMe₂Ph, PMePh₂, PPh₃, or ½Ph₂PCH₂CH₂PPh₂; M = Pd, PR₃=½ Ph₂PCH₂CH₂PPh₂) in dichloromethane yields [M(S₂N₂H)(PR₃)₂][Me₂SnCl₃]. If the reaction is carried out in the presence of [NH₄][PF₆] then PF₆^– salts are obtained. The complexes have been characterised by microanalysis, i.r., ³¹P and ¹H n.m.r., and, in the case of [Pt(S₂N₂H)(PEt₃)₂][Me₂SnCl₃] and [Pt(S₂N₂H)-(PBuⁿ₃)₂]₂[PF₆]Cl, by X-ray crystallography. The reaction of [CoCl₂{Ph₂P(O)CH₂CH₂P(O)Ph₂}] with (Me₂SnS₂N₂)₂ gave [(Co)S₂N₂H)₂}₂(Ph₂P(O)CH₂CH₂P(O)Ph₂}], whose structure was established by X-ray crystallography.