Bonding organosilicon compounds

Our discussion to this point has been limited to molecules m which the chirality center IS carbon Atoms other than carbon may also be chirality centers Silicon like carbon has a tetrahedral arrangement of bonds when it bears four substituents A large number of organosilicon compounds m which silicon bears four different groups have been resolved into their enantiomers... 

Organosilicon compounds are widely used in our daily life as oil, grease, rubbers, cosmetics, medicinal chemicals, etc. However, these compounds are not naturally occurring substances but artificially produced ones (for reviews of organosilicon chemistry, see [59-64]). Hydrosilylation reactions catalyzed by a transition-metal catalyst are one of the most powerful tools for the synthesis of organosilicon compounds. Reaction of an unsaturated C-C bond such as alkynes or alkenes with hydrosilane affords a vinyl- or alkylsilane, respectively (Scheme 16). 

General Features of Carbon-Carbon Bond-Forming Reactions of Organosilicon Compounds... 

In the case of a C=C bond containing organosilicon compounds, the presence of a Si atom does not exert any appreciable influence on addition in an apolar solvent. In a polar solvent, however, the rupture of the C—Si bond also occurs... 

The reactivity of organosilicon compounds is influenced by the more electropositive nature of the silicon atom as compared to carbon and hydrogen and also by the availability of empty d orbitals, although the latter point has now become controversial. On this basis Si-0 and Si-F bonds are stronger than the C-0 and C-F bonds. The Si-H bonds are weaker than C-C and H-C bonds. 

Expedited Organic Synthesis with Organosilicon Compounds Creation of a Bond Protection of Groups Activation... 

It is quite surprising that the influence of 7r-complex formation on the reactivity of Si—C bonds has been so little investigated to date, in spite of the importance of such studies for the purpose of regulating the chemical behavior of organosilicon compounds. 

Hydrosilylation, the addition of a silicon-hydrogen bond to multiple bonds, is a valuable laboratory and industrial process in the synthesis of organosilicon compounds. The addition to carbon-carbon multiple bonds can be accomplished as a radical process initiated by ultraviolet (UV) light, y irradiation, or peroxides. Since the discovery in the 1950s that chloroplatinic acid is a good catalyst to promote the addition, metal-catalyzed transformations have become the commonly used hydrosi-... 

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