Synthesis of novel trialkyl(trichlorostannyl)platinum(IV) complexes through SnCl2 insertion into the Pt-Cl bond

Article abstract of DOI:10.1021/om0207414

Reaction of SnCl₂ with the trialkylplatinum(IV) complexes [PtClMe₂(R)(bipy)] (1) resulted in the formation of the novel trialkyl(trichlorostannyl)platinum(IV) complexes [PtMe₂(R)(SnCl₃)(bipy)] (R = allyl (2a), Me (2b), Bz (2c)). The solid-state molecular structure of fac-[PtMe₃(SnCl₃)(bipy)] revealed a direct PtSn bond (2.6497(2) A) and three almost identical PtMe bond lengths (2.065(5) and 2.068(8) A both cis and 2.069(5) A trans to SnCl₃. The presence of platinum satellites (¹J_SnPt = 3267-4260 Hz) in the ¹¹⁹Sn NMR spectra of complexes 2 indicates that the direct platinumtin bond is maintained in solution. Addition of 1 equiv of PPh₃ to complexes 2 resulted in the formation of the trichlorostannate complexes fac-[PtMe₂(R)(bipy)(PPh₃)][SnCl₃] (3). The absence of platinum satellites on the ¹¹⁹Sn NMR signal of 3 confirmed the ionic character of these complexes in solution.