Dichlorodimethylsilane, reaction with

Ethyl l//-azepine-l-carboxylate and chlorotrimethylsilane, in hexamethylphosphoric triamide in the presence of magnesium, followed by quenching into water, yields the 1 2 trans-adduct 3.279 The reaction follows a similar path with dichlorodimethylsilane, whereas with dichloro-diphenylsilane a mixture of the 1 2 adduct 4 and the disiloxane 5 is obtained. 

VUIb is formed by dimerization of the diazasilaindane, Vb, and subsequent reaction of the cyclic dimer, Vllb, with bis(phenylamino)-dimethylsilane, VIb, as it was shown in separate experiments starting from Vb and VIb. It was subsequently found that VUIb is formed in fairly good yield whenever o-phenylenediamine is brought into reaction with difunctional silanes, such as dichlorodimethylsilane, bis(diethylamino)dimethylsilane and hexamethyl-cyclotrisilazane. 

The strategy of incorporating silicon as a reactive component in the polymeric system to attain flame retardancy has been explored. For example, Ebdon et al. carried out silylation to the polystyrene using //-butyl lithium in the presence of tetramethylethylenediamine, followed by reaction with trimethylchlorosilane, dichlorodimethylsilane, or trichloromethylsilane, as shown in Scheme 8.1. Poly(vinyl alcohol) films have also been modified with chlorosilanes (Scheme 8.1). 

Organocyclosilazanes undergo ring opening and cleavage to form linear fragments, a,CO- Difunctional di- and trisilazanes are obtained in reactions with acids, alcohols, phenols, thiols, hydrogen chloride, silicon tetrafluoride diammoniate or dichlorodimethylsilane ... 

This method is used for the production of many different kinds of polymers. The most difficult problems may be (1) how to get the first few double bonds to break apart, and (2) how to stop the polymerization reaction at just the right point. The method used to make most SBS today involves the use of a butyl lithium (C4H9Li) catalyst, which is very effective in getting the reaction started. The reaction is terminated at some given point by the addition of dichlor-odimethylsilane (SiCl2(CH3)2). The dichlorodimethylsilane reacts with the last monomer at the end of the SBS chain, blocking the addition of any additional styrene or butadiene monomers. 

Dichlorodimethylsilane. See Dimethyidichlorosilane Dichlorodimethylsilane, reaction prods, with silicd... 

Dichlorodimethylsilane, reaction prods, with silica Siloxanes and silicones, dimethyl, reaction prods, with silica free-flow agent, insecticides Dichlorodimethylsilane, reaction prods, with silica... 

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