摘要: The compound (3-Fluoro-3,3-dinitropropyl)methyldiphenysilane was prepared from (3-bromopropyl)methyldiphenylsilane by sodium nitrite displacement, oxidative nitration and fluorination. Reaction with bromine gave (3-fluoro-3,3-dini... 展开 The compound (3-Fluoro-3,3-dinitropropyl)methyldiphenysilane was prepared from (3-bromopropyl)methyldiphenylsilane by sodium nitrite displacement, oxidative nitration and fluorination. Reaction with bromine gave (3-fluoro-3,3-dinitropropyl)methyldibromosilane. The dibromide was hydrolyzed under a variety of conditions to give cyclic polysiloxanes. The dibromide or the polysiloxanes reacted with HF to give (3-fluoro-3,3-dinitropropyl)methyldifluorosilane, which was hydrolyzed readily by base but was relatively stable to aqueous acid. Polymerization of the cyclic polysiloxanes was studied. By a synthesis sequence similar to that above, bis-2(3-fluoro-3,3-dinitropropyldiphenylsilane was prepared. Brominative dephenylation and hydrolysis gave the cyclic trisiloxane. The reaction of fluorodinitroethanol with poly(dichlorophosphazine) in pyridine gave replacement of chlorines by fluorodinitroethoxy groups, but considerable amounts of pyridine were also incorporated into the polymer. 收起