Organosilicon compounds benzene

To prepare multifunctionalized symmetric organosilicon compounds by the polyalkylation of benzene. (2-chloroethyi)trichlorosilane and (3-chloropropyl)tri-chlorosilane were reacted with benzene. Polyalkylations of benzene with (2-chloroethyl)silane and (3-chloropropyl)silane were carried out in the presence of aluminum chloride catalyst at a reaction temperature of 80 C. The reaction of benzene with excess (2-chloroethyI )trichlorosilanes afforded pcralkylated product, hexakis(2-(trichlorosilyl)ethyl)benzene in good yield (70%). ... 

Application of first- and second-order perturbation models to organosilicon compounds will be discussed for Me3SiCH293 and (Me3Si) CH3 M95 substituted benzenes. 

The widespread and useful subdivision of larger molecules into parent systems and substituents and their comparison based on first- and second-order perturbation arguments [1, 14] have proved tremendously valuable for organosilicon compounds as well [1]. Especially important is the extreme electron donor effect of (H3C)3SiCH2 substituents, discovered over 30 years ago [17-19] by way of the low first ionization energies of organosilicon molecules containing 3-silyl-substituted lone pairs [20] (Fig. 7) or prototype 7t-systems such as benzene [17], ethene [18], or acetylene [19] (Fig. 8). 

Bordeau, M., Clement, C., Structural Study on Organosilicon Compounds by Depolarized Rayleigh Scattering. Determination of the Sign of Optical Anisotropies of Bonds and Groups with or without Silicon in the Aliphatic and Benzenic Series, J. Organometal. Chem. 202 [1980] 137/48. 

The strained-ring compound 1,1-dimethyl-l-silacyclobutane (which may be regarded as an olefin of organosilicon chemistry) reacts with diiron nonacarbonyl in benzene at 6°-20°C as shown in Eq. (100) (89). (There is here some analogy with the reactions of transition metal complexes with strained hydrocarbons, which often produce valence tautomerization.) The... 

In view of recent reports, it seems prospective to use the reaction of trans sily-lation for the synthesis of other types of unsaturated compounds, particularly for the synthesis of novel organosilicon starburst compounds having a silicon-bridged -conjugated structure which is expected to have potential optoelectronic properties. The effective functionalization of l,3,5-tris(dimethylvinylsi-lyl)benzene by the respective reactions with 1,4-divinylbenzene leads to the formation of a dendrimer (Fig. la) [55]. 

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