Reaction with chlorosilanes

A similar reaction with chlorosilanes leads to corresponding salts.291... 

Reactions. The reagent can be used for preparation of 1,1-difluoroallylsilanes by reaction with chlorosilanes (50-90% yield), but the most useful reaction is the difluoroallylation of carbonyl compounds.1 Examples ... 

Scheme l.545 The cobalt and nickel complexes M(S2N2H)2 (M = Co or Ni) may also take part in condensation reactions with chlorosilanes to give cobalt- and nickel-containing heterocyclic systems (Scheme 2).546 The... 

At the same time there are spectroscopic data a.s well as results of chemical analyses and researches on the kinetics of reactions with chlorosilanes [1] which give evidence for the fact that during the chemisorption of HSiCla on the hydrated silica one observes, most probably, the predominant formation of surface compounds with the following structure ... 

The reaction with chlorosilanes (Scheme 6) leads in three steps to a propargylide which finally — under steric control — yields allene or propyne derivatives. With... 

Silica particles have surface silanol groups, — SiOH. These are used for chemical bonding of stationary phases by silination reactions with chlorosilanes ... 

We were able to prove that it is possible to synthesize the highly enantiomerically enriched silyllithium compound 2 (ee > 98 %) in large amounts and to perform stereospecific reactions with chlorosilanes. Due to the observed racemization of 2 in solution, we believe that a thorough reassessment of previous studies concerning optically active silyllithium species is in order. 

Numerous coupling reactions with chlorosilanes as well as with other halides of various different elements have, with great success, been applied in one-step procedures. 

Silica surfaces are often hydrophobized with MesSi or related groups to improve reinforcement in silicone polymers. Typically, base-catalyzed (which may include the surface itself) reaction with chlorosilanes completes this conversion. A related SiOH + HSi coupling process catalyzed by B(C6F5)3 has been utilized to create hydrophobic silicone surfaces (Fig. 15c) [67]. 

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