Cleavage Reactions of Some Organopolysilanes

Highly symmetrical catenated and polymeric organic compounds of group IVB elements

“…Cleavage of some organopolysilanes by Li resulting in the formation of organosilyllithium reagents has also been reported (7). Octaphenyltrisilane is cleaved by lithium in tetrahydrofuran to give a mixture of triphenylsilyllithium and pentaphenyldisilanyllithium (7).…”

“…Octaphenyltrisilane is cleaved by lithium in tetrahydrofuran to give a mixture of triphenylsilyllithium and pentaphenyldisilanyllithium (7). Subsequent to acid hydrolysis, triphenylsilane and pentaphenyldisilane were obtained in almost equimolar amounts.…”

“…When decaphenyltetrasilane was treated in the same manner, pentaphenyldisilane was obtained in a 45.2% yield. In addition, 30.8% of triphenylsilane and 17% of heptaphenyltrisilane were isolated ( 7). Triphenylsilane has been shown to react with lithium in ether to give triphenylsilanol and hexaphenyldisilane on hydrolysis (8).…”

Some comparisons of linear and branched-chain organopolysilanes

“…In 1964, Urry et al, (13)(14)(15) An attempt to prepare tetrakis(triphenylsilyl)silane by the treat ment of tetrachlorosilane with four moles of triphenylsilyllithium gave hexaphenyldisilane as the only isolable product (16), A similar attempt to prepare this compound by the addition of triphenylsilylsodium to tetra chlorosilane was also unsuccessful.^ However, in addition to hexaphenyl disilane, this latter reaction gave IV in ca^ 4^ yield. This unexpected product was probably formed by the hydrolysis of the corresponding silylsodium compound.…”

Some comparisons of linear and branched-chain organopolysilanes

“…Phenyl-substituted organopolysilanes An attempt to prepare tetrakis(triphenylsilyl)silane by the treat ment of tetrachlorosilane with four moles of triphenylsilyllithium gave hexaphenyldisilane as the only isolable product (16), A similar attempt to prepare this compound by the addition of triphenylsilylsodium to tetra chlorosilane was also unsuccessful.^ However, in addition to hexaphenyl disilane, this latter reaction gave IV in ca^ 4^ yield. This unexpected product was probably formed by the hydrolysis of the corresponding silylsodium compound.…”