Diphenyl dichlorosilane

Diphenyl dichlorosilane, 59 Diphenyl oxide, 59 Diphenylamine, 58 1,2-DiphenyUiydrazine, 59 DIPLAST , phthalates, 59 Dipropyl ketone, 59 Dipropylamine, 59 Dipropylene glycol methyl ether, 59 Diquat, 59... 

Diphenyl dichlorosilane Dodecyl trichlorosilane Phenyl trichlorosilane Trimethyl trichlorosilane Vinyl trichlorosilane... 

The perphenylsilacycles, (Ph2Si) where n = 4,5 and 6, can be made from diphenyl-dichlorosilane with Na metal, but are best obtained by condensing diphenyldichlorosi-lane with Li metaL . With just 2 equiv Li in THF, the kinetic product (PhjSi), obtained in yields up to 75% ... 

The magnesium dichloride was reacted with 2-ethyl-1-hexanol (1 2 molar ratio) in decane at 120°C for two hours. A stoichiometric amount of dibutylphthalate (DBPh/MgCl = 0.15) was added in the reaction mixture and stirred for one hour at 120°C. The obtained solution was added into decane solution of diphenyl-dichlorosilane (Si/Mg molar ratio = 30) in controlled manner at room temperature. The reaction mixture was heated to 120°C and allowed to react for two hours. The solid product was separated by filtration and washed with hexane. It was treated with titanium tetrachloride (Ti/Mg molar ratio = 40) at 120°C for two hours. The liquid was decanted from reaction mixture at 120°C. The solid product obtained was washed with decane followed by hexane. Catalyst (Mg-Ti) was dried in vacuum for two hours. 

Aryl ethers are less powerful directing groups than alkyl ethers 142 gives only 143 . Diaryl ethers can usually be lithiated on one (the more acidic) or both rings, according to the amount of aUtyllithium employed. Diphenyl ether 144 will give, for example, silaxanthene 145 on quench with a dichlorosilane (Scheme 71). 

The R1 values obtained for such phenylethynyl substituted siloxanes are higher then that reported for traditional aromatic-based systems [9] or the phenol modified ones (1.50-1.53) [10]. The synthesis of high refractive index (methyl)(diphenyle thenyl)-dichlorosilane via hydrosilylation was also described [1]. Such monomer was later hydrolyzed and condensed into silicone fluid. Similar process was also presented, applying silylative coupling process in the synthesis of an analogous (methyl)(phenylethenyl)diethoxysilane [11], so the two reactions shall be discussed in the following section. 

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