Preparation of the sixteen-atom ring chelates trans-[M2Cl4{ButS(CH2)5 SBut}2], M = Pd or Pt: crystal structure of trans-[Pd2Cl4{ButS(CH2)5SBut}2]

Abstract

Treatment of [PdCl₂(NCPh)₂] or [PtCl₂(NCBu^t)₂] with the new disulphide Bu^tS(CH₂)₅SBu^t gives 16-atom ring chelates of the type trans-[M₂Cl₄{Bu^tS(CH₂)₅SBu^t}₂]. Crystals of the compound with M = Pd are monoclinic, space group P2₁/n, with a= 17.359(4), b= 11.278(4), c= 23.080(6)Å, β= 101.19(2)°, and Z= 4. The 16-membered ring is rectangular with the bulky Bu^tS groups forming the four corners, and it has the elongated-boat or ‘barge’ conformation.