A BULKY TRIS(TRISILYL) METHYL LIGAND INCORPORATING A DONOR SULFUR ATOM - SOME (ME(3)SI)(2)(PHSME(2)SI)CSNME(2)X COMPOUNDS

Reaction of (Me(3)Si)(2)(PhSMe(2)Si)CCl with BuLi at low temperature g ave the organolithium reagent (Me(3)Si)(2)(PhSMe(2)Si)CLi, which was t reated with Me(3)SnCl to give (Me(3)Si)(2)(PhSMe(2)Si)CSnMe(3). Reacti on of the latter with a one or two molar proportion of iodine gave the monoiodide (Me(3)Si)(2)(PhSMe(2)Si)CSnMe(2)I and the diiodide (Me(3)S i)(2)(IMe(2)Si)CSnMe(2)I respectively. The corresponding reaction with even a one molar proportion of bromine gave mainly the dibromide (Me( 3)Si)(2)(BrMe(2)Si)CSnMe(2)Br. Treatment of the monoiodide with an exc ess of AgCN in CDCl3 gave (Me(3)Si)(2)(PhSMe(2)Si)CSnMe(2)CN, but simi lar treatment with AgBF4 gave mainly the difluoride(Me(3)Si)(2)(FMe(2) Si)CSnMe(2)F. Hydrolysis of the diiodide gave the mixed diol (Me(3)Si) (2)(HOMe(2)Si)CSnMe(2)OH.