Oxygen-silicon bond forming reactions

Oxygen - Silicon Bond Forming Reactions 0-Si bond 1... 

Specific reaction to form metal-oxygen-silicon bonds must be involved in many cases rather than simple ionic attraction. An analogous formation of Pb-O-Al bonds occurs when positively charged Pb is strongly adsorbed on gamma alumina below the pzc where the alumina is also positively charged (264). 

Silicon most often forms single bonds and, as a result, when it bonds to oxygen it bonds to four different atoms. This type of bonding gives rise to the numerous chain and sheet structures that were described earlier. However, the bonds need not all be to oxygen atoms, and many compounds are known in which alkyl groups are bonded to the silicon. The reaction... 

In the case of base-induced elimination, the Peterson alkenation relies on the strong bond formed between silicon and oxygen, and the ready propensity for silicon to be attacked by alkoxide, to drive the reaction. In the original study by Peterson, the -silylcarbinols were prepared by the addition of (trimethylsilyl)methylmagnesium chloride to the carbonyl. The caibinols were subsequently eliminated by treatment with sodium or potassium hydride or with sulfuric acid to form the methylene derivatives in excellent yield. The Peterson reaction has proven to be of general utility in the synthesis of alkenes. ... 

The preparation of a porous silicon carbide has been described by Fox and co-workers (10). The synthesis is based on heating the organosilicon pol3nmer (0 1158iOj 5) at 1600 C under argon (see Fig. 1). The pyrolysis reaction results in an intramolecular carbothermic reduction, i.e. the carbon bonded to silicon is used to remove oxygen and to form the carbide (the commercial manufacture of silicon carbide uses an external source of carbon for example, by mixing quartz sand and petroleum cokes). The product is purified by oxidation to remove excess carbon, followed by treatment with HF to remove silica. 

---