The synthesis and characterisation of novel dimethyl- and diphenyl-silanediolates

Schamschurin, Andrew; Uhrig, David; Fisher, Mark; Clarke, Stephen; Matisons, Janis G.

doi:10.1007/s11201-008-9034-6

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…Treatment of dimethyl sulfate with aluminum chloride [49] or sodium chloride [50] results in the formation of monochloromethane. Methane reacts with phosgene at 400 C to give CH 3 Cl [51].…”

Section: Liquid-phasementioning

confidence: 99%

Chloromethanes

Rossberg¹,

Lendle²,

Pfleiderer³

et al. 2011

Ullmann's Encyclopedia of Industrial Chemistry

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Section: Liquid-phasementioning

confidence: 99%

Chloromethanes

Rossberg¹,

Lendle²,

Pfleiderer³

et al. 2011

Ullmann's Encyclopedia of Industrial Chemistry

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“…It was hoped that the reaction might lead to alternating copolymers, with one unit consisting of the dimethylsiloxym oiety,a nd the other the diphenylsiloxy moiety.H owever,t he potassium silanolate endgroups and bound water of hydration, lead to the formation of ar andom copolymer,b ut still retaining a1:1 molar ratio of the two feed monomers. [25][26][27] (3) Synthesis of anhydrous dialkali dimethylsilanediolate and siloxanec opolymers Dimethyl and diphenylsilanediolates [28] were shown to have potentialt ob ei ntermediates in the interfacial polymerisation of dimethyl and diphenyl-siloxane polymers. Whilst the dipotassium dimethylsilanediolate monohydrate salt could be used to preparec opolymers, these had ar andom structurea nd there was concern the single water molecule of hydration, might be the cause of this randomisation,a nd other unwanted side reactions.…”

Section: Silicone Polymer Researchmentioning

confidence: 99%

“…Dimethyl and diphenylsilanediolates were shown to have potential to be intermediates in the interfacial polymerisation of dimethyl and diphenyl‐siloxane polymers. Whilst the dipotassium dimethylsilanediolate monohydrate salt could be used to prepare copolymers, these had a random structure and there was concern the single water molecule of hydration, might be the cause of this randomisation, and other unwanted side reactions.…”

Section: Silicone Polymer Researchmentioning

confidence: 99%

Advanced Silicon Chemistry in Australia: Forming Strong Links with Asia

Clarke¹,

Nguyen

Markovic³

et al. 2017

Chemistry An Asian Journal

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This paper details Australianc ommercial and academic silicon research. Areas of interest include silicon metal, polysiloxane polymers, copolymers, cyclics, emulsions, microemulsions, silanes, silane coupling agents, sol-gel chemistry and water-treatments, porouss ilicon, polysiloxane degradation, silicon hydrogel contact lenses, silanolate synthesis, siloxanei nterfacial polymerisation, hydrosilylation, polysiloxanee lectrolytes forl ithium ion batteries, silanes for PBX materials, octafunctionalized polyhedralo ligomeric silsesquioxanes (POSS), POSS hybrids, sol-gel hydrogenation catalysts, silane modification of silica, sol-gel energy storage, silicate grout stabilisation,G eoPolymer concretes, aerogel insulatingfoams,"Phaco-Ersatz"A ccommodating Gel-Intraocular Lens technologies. Strong collaborative opportunities, in silicon, with Asia, exist with organisationss uch as:1 )The Asian Silicon Society and 2) The Agency for the Assessment and Application of Technology (BPPT) Indonesia. General OverviewHigh-cost, specialised silicon materials, including silicone polymers, have reduced in price, over the years and,i nm any instances, are now competitive in cost and application,w ith counterpart petrochemical derived, organic materials and polymers. Clarson has identified the growth of silicon options, from a2 5% increase in annual demandf or silicon used in solar panel applications,w hichh as been the drivingf orce, pushing down the cost of many silicon applications. [1] Silicon materials have been used for aw ide variety of applications,a nd Australia has played ak een role in the development of many new silicon materials. Siliconm aterials are used for aw ide variety of applications including:s olar panelsf or electricale nergy;a pplicationsi ns pecialist materials;p hotonics;e nvironmental applications;m etallurgicala pplicationsa nd surfacemodification.[2]

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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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The synthesis and characterisation of novel dimethyl- and diphenyl-silanediolates

Cited by 6 publications

References 9 publications

Chloromethanes

Chloromethanes

Advanced Silicon Chemistry in Australia: Forming Strong Links with Asia

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

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