Journal of Organometallic Chemistry p. 43 - 55 (1967)
Update date:2022-08-17
Topics:
Kumada, Makoto
Tamao, Kohei
Takubo, Tadashi
Ishikawa, Mitsuo
Four 1,2-disilacycloalkanes of the formula Me2SiSiMe2-(CH2)n, where n equals 3, 4, 5 and 6, have been prepared by two methods: one involves reaction of ClMe2SiSiMe2Cl with BrMg(CH2)nMgBr, the other comprises sodium/potassium condensation of ClMe2Si(CH2)nSiMe2Cl. It has been found that both the disilacyclopentane and -hexane exclusively undergo cleavage of the silicon-silicon bond when treated with concentrated sulfuric acid, whereas the disilacycloheptane gives several products in which the silicon-silicon bond has not been cleaved. The disilacyclopentane undergoes cleavage of the silicon-silicon bond when heated with 0.6 N sodium ethoxide in ethanol at 90°, while the disilacyclohexane is quite stable under the same conditions.
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