Reactions of the Divalent Tin Compounds R2M, R = N(SiMe3)2 or CH(SiMe3)2 with Complexes of the Platinum Group Metals

The stannylenes R2Sn, (R = N(SiMe3)2 or CH(SiMe3)2) insert into M–X bonds of complexes [MX2L2] to give new complexes of the general formula [MX(SnR2X)L2], (M = Pt, Pd, Ni; X = Cl, N3, NO2; L = PEt3, PBu3, DPPE). They also insert into Pt–Cl bonds of the bridged complexes [{Pt(μ-Cl)Cl(L)}2], to give the new bridged complexes[{Pt(μ-Cl)(SnR2Cl)(L)}2], (R = N(SiMe3)2, L = PEt3, PBu3, PMe2Ph, PPh3), in which the bridge remained uncleaved. In one reaction of the stannylene R2Sn, where R = CH(SiMe3)2, the bridged complex [{Pt(μ-Cl)(SnR2Cl)(PEt3)}2] undergoes cleavage followed by migration of Cl to give [PtCl(SnR2Cl)(η2-SnR2)(PEt3)]. Further, the bridged complex [{Pt(μ-Cl)(SnR2Cl)(PEt3)}2], (R = N(SiMe3)2), with the neutral ligands L’, (L’ = PPh3, pyridine or AsPh3), undergoes bridge cleavage to form the complexes [PtCl(SnR2Cl)(PEt3)(L’)]. The reaction of the stannylene R2Sn, (R = N(SiMe3)2) with the platinum(0) complexes [Pt(C2H4)(PPh3)2] and [Pt(COD)2], COD = 1,5-cyclooctadiene is described. The complexes obtained have been characterised mainly by 31P NMR spectroscopy and elemental analysis.