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Abstract
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A series of binuclear organoplatinum(II) complexes of general formula cis,cis-[R2Pt(l-SMe2)(l-dppm)Pt(o-MeC6H4)2], 3a–3d, in
which R = Ph, p-MeC6H4, m-MeC6H4 or p-MeOC6H4, were prepared by the reaction of monomeric precursors [Pt(o-
MeC6H4)2(dppm)] and cis-[PtR2(SMe2)2]. The binuclear dialkyl analogs, in which R = Me (3e) or R2 = {(CH2)4} (3f), were prepared
by the reaction of cis-[Pt(o-MeC6H4)2 (SMe2)2] and [PtR2 (dppm)]. The complexes were fully characterized by multinuclear (1H, 13C,
31P, 195Pt) NMR spectroscopy each as a mixture of syn and anti isomers (depending on the relative orientations of Me substituents
on o-tolyl ligands) and each isomer was shown to have a rigid structure. Other binuclear analogs cis; cis-½R2Pt?l-SMe2?
?l-dppm?PtR0
2, 3g–3j, in which R is a less steric demanding aryl groups m-MeC6H4 or p-MeOC6H4, and R0 =Me or
R0
2 ¼ f?CH2?4g, were prepared by the reaction of cis-[PtR2(SMe2)2] and ½PtR0
2?dppm?, and shown to have fluxional structures.
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