Synthesis and properties of some crowded organotin compounds

Article abstract of DOI:10.1016/0022-328X(88)89008-9

The preparations of the compounds (Me3Si)3CSnMe2X (X= Cl, Br, I, CN, NCS, O2CMe, O2CCF3, O3SMe, or NO3), (Me3Si)3CSnPh2X (X= Cl or Br), and (Me2PhSi)3CSnMe2X (X= Me, Cl, Br or I) are described.Treatment of (Me2PhSi)3CSnMe2Cl with one equivalent of MeLi gives (Me2PhSi)3CSnMe3, but with additional MeLi (Me2PhSi)3CLi is formed.The compound (Me3Si)2C(SnMe3)2 is obtained by reaction of (Me3Si)2CCl2 with either one or two equivalents of Me3SnLi, and on treatment with MeLi gives the useful reagent (Me3Si)2(Me3Sn)CLi.The latter reacts with Me2SiCl2 and give (Me3Si)2(Me3Sn)C(SiMe2Cl) and with Me2SiHCl to give (Me3Si)2(Me3Sn)C(SiMe2H), which reacts with a one molar proportion of Br2 to give (Me3Si)2(Me3Sn)C(SiMe2Br), and with a two molar proportion of Br2 to give (Me3Si)2C(SnMe2Br)(SiMe2Br).Reaction of (Me3Si)2C(SnMe3)2 with two equivalents of ICl or Br2 gives the dihalides (Me3Si)2C(SnMe2X)2 (X= Cl or Br), and reaction of (Me3Si)2C(SnMe2Br)(SiMe2Br) with PhLi gives (Me3Si)2C(SnMe2Ph)(SiMe2Br).