Formation of platinum–silicon, –germanium, and –tin complexes by cleavage of platinum–carbon bonds and by oxidative addition of trimethylstannane to platinum complexes

Abstract

Trimethylstannane displaces alkane from [PtR₂{(Ph₂P)₂CH₂}](R = Me or Et) at room temperature, or at 50 °C when R = Ph. The d⁶ product, [PtH(SnMe₃)₃{(Ph₂P)₂CH₂}](I), reversibly dissociates in solution to [Pt(SnMe₃)₂{(Ph₂P)₂CH₂}]. Trimethyl-silane and -germane displace only 1 mol equiv. of alkane forming [Pt(MMe₃)(Me){(Ph₂P)₂CH₂}](M = Si, Ge). The lead complex [Pt(PbPh₃)₂{(Ph₂P)₂CH₂}] gives (I) and Pb₂Ph₆ with SnHMe₃. [PtCl₂{(Ph₂P)₂CH₂}] on reaction with SnHMe₃ yields the d⁶ complex [PtClH(SnMe₃)₂{(Ph₂P)₂CH₂}](II) which dissociates to [PtCl(SnMe₃){(Ph₂P)₂CH₂}](III) in solution. Similarly, oxidative addition of SnHMe₃to [Pt{(Ph₂P)₂CH₂}₂] produces [Pt(SnMe₃)₂{(Ph₂P)₂CH₂}].