62139-77-9Relevant articles and documents
On the Way to Silaethene Me2Si=C(SiMe3)2: Trisilylated Methanes (Me3Si)2(Me2XSi)CY (X=e. g. Hal, RO, RS; Y e. g. Br, Li)
Wiberg, Nils,Preiner, Gerhard,Schieda, Oswald
, p. 2087 - 2103 (2007/10/02)
Bromotrisilylmethanes (Me3Si)2(Me2XSi)CBr (1 - 15) are formed as a result of the reaction of (Me3Si)2(Me2PhSi)CBr (16) with iodine monochloride, bromine and iodine (X = Cl, Br, I) respectively, and also through the reaction of (Me3Si)2(Me2BrSi)CBr (1) with AgX (X = F, p-TolSO2, p-TolSO3, MesSO3, Ph2PO2, Ph2PO3, Ph2PO4) or MX (M = H, Li, Na; X = HO, RO, RS, Bu, Ph).Butyl- as well as phenyllithium convert bromotrisilylmethanes 1 - 16 at low temperatures into lithium derivatives (Me3Si)2(Me2XSi)CLi (1a - 16a).These are in some cases (X = R, RO) thermostable, whereas, in other cases they decompose more or less readily under LiX elimination and lead (in many cases via silaethene Me2Si=C(SiMe3)2) to the disilacyclobutane derivative 2 (17).Acids HZ (e. g.HCl, HOMe, Me3CBr) protonate the lithium compounds into (Me3Si)2(Me2XSi)CH as well as (Me3Si)2(Me2ZSi)CH.Butyl bromide converts the more stable lithium compounds (Me3Si)2(Me2XSi)CLi (X = R, RO, F, Ph2POn) into butyl derivatives (Me3Si)2(Me2XSi)CBu.
