New Approach to the Synthesis of Symmetrical 1,3-Dichloro-1,1,3,3-Tetraorganyl- and 1,1,3,3-Tetrachloro-1,3- Diorganyldisiloxanes

Basenko, S. V.; Maylyan, A. A.; Солдатенко, А. С.

doi:10.1007/s12633-016-9474-0

Cited by 3 publications

(1 citation statement)

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“…Mixed dimethylcyclotetrasiloxanes can form selectively using either diorganosilanediols or trisiloxanes with terminal functional groups. While the stability of diorganosilanediols limits the former approach [ 41 , 42 , 43 , 44 ], the multistep preparation and complexity of the method limit the latter [ 19 , 45 , 46 , 47 , 48 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers

et al. 2021

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This paper reports a method for the synthesis of 1,1,3,3,5,5-hexamethyl-7,7-diorganocyclotetrasiloxanes by the interaction of 1,5-disodiumoxyhexamethylsiloxane with dichlorodiorganosilanes such as methyl-, methylvinyl-, methylphenyl-, diphenyl- and diethyl dichlorosilanes. Depending on the reaction conditions, the preparative yield of the target cyclotetrasiloxanes is 55–75%. Along with mixed cyclotetrasiloxanes, the proposed method leads to the formation of polymers with regular alternation of diorganosylil and dimethylsylil units. For example, in the case of dichlorodiethylsilane, 70% content of linear poly(diethyl)dimethylsiloxanes with regular alternation of units can be achieved in the reaction product. Using 7,7-diethyl-1,1,3,3,5,5-hexamethylcyclotetrasiloxane as an example, the prospects of the mixed cycle in copolymer preparation in comparison with the copolymerization of octamethyl- and octaethylcyclotetrasiloxanes are shown.

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