80249-58-7Relevant academic research and scientific papers
Lithium Fluorosilanolates - Units of Chain and Ring Siloxanes
Klingebiel, Uwe
, p. 3366 - 3371 (2007/10/02)
Potassium hydroxide reacts with difluorosilanes R-SiF2-R' (1 - 4: R = R' = CMe3, NC2H5(SiMe3), N-iC3H7(SiMe3); R = CMe3, R' = C6H5) to give the fluorosilanols R-FSiOH-R' (7 - 10).The siloxane is obtained in the reaction of SiF2 (6) with KOH via a 1,3-silyl group migration. 7 - 10 react with butyllithium to give the lithium fluorosilanolates 11 - 14.The reaction of these lithium salts with halogensilanes leads to the formation of the halogen functional siloxanes 15, 17 - 21.Lithiated 16 (22) is substituted by fluorosilanes at the nitrogen (23 - 25).The cyclic siloxanes 26 - 28 are formed by thermal LiF elimination from 11 and 12.Dilithiated di-tert-butylsilanol reacts with 15 to give 2,2,4,6-tetra-tert-butyl-4,6-diphenylcyclotrisiloxane (29).
