Alkylation reaction

Friedel-Crafts alkylation reaction of vinyltri-methoxysilane with styrene was performed in the pres-ence of anhydrous AlCl₃. Alkoxy(4-vinylphenethyl)silane has been obtained. The synthesized products were identified by ¹H, ¹³C, COSY NMR, and FTIR spectroscopy. Calculations using the quantum-chemical non-empirical density functional theory (DFT) method for the reaction between vinyltrimethoxysilane and styrene performed for ortho-, meta- and para-positions were discussed.

Hydrosilylation of triethoxysilane with the mixture of ortho- and para-divinylbenzene in the presen¬ce of Karstedt’s catalyst has been carried out and the corresponding product triethoxy(vinylphenethyl)silane have been obtained. The structure and composition of the obtained product were proved by means of determining molecular mass, molecular refraction, and ¹H and ¹³C NMR spectra data. It was found that the addition reaction proceeds both in ortho-position as well as in para-position.