Oxidative Addition to a Monomeric Stannylene To Give Four-Coordinate Tin Compounds Containing the Bulky Bidentate Ligand C(SiMe₃)₂SiMe₂CH₂CH₂Me₂Si(Me₃Si)₂C. Crystal Structures of CH₂Me₂Si(Me₃Si)₂CSnC(SiMe₃)₂SiMe₂CH₂, CH₂Me₂Si(Me₃Si)₂CSnMe(OCOCF₃)C(SiMe₃)₂SiMe₂CH₂, and (CF₃COO)₂MeSnC(SiMe₃)₂SiMe₂CH₂CH₂Me₂Si- (Me₃Si)₂CSnMe(OCOCF₃)₂

Abstract

Reaction of (THF)2KRRK(THF)2 (RR = C(SiMe3)2SiMe2CH2CH2Me2Si(Me3Si)2C) with SnCl2 in Et2O gave a mixture of the cyclic and linear SnII compounds 4, and ClSnRRSnCl, 9. This mixture was treated with MeI to give the corresponding SnIV compounds 5, and IClMeSnRRSnMeClI, 10. Treatment of 5 and 10 with AgO2CCF3 gave the corresponding trifluoroacetates 6 and 11, which were structurally characterized.