Redistribution reactions of alkoxy- and siloxysilanes, catalyzed by dimethyltitanocene

1 March 1990

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 68 (3) , 471-476
https://doi.org/10.1139/v90-071

Abstract

Dimethyltitanocene is an excellent catalyst for the redistribution of alkoxy- and siloxyhydrosilanes. The redistribution reactions of triethoxysilane, diethoxymethylsilane, 1,3,5,7-tetramethylcyclotetrasiloxane, pentamethyldisiloxane, and H—(SiMe₂O)_n—SiMe₂H (n = 1 to 3) are described. The mechanism of these reactions is discussed in terms of TiH mediated displacements. The possibility of both Ti(III) and Ti(IV) mediated displacements are considered and a mechanism involving the former, which fits all of the experimental data, is proposed. Keywords: siloxanes, alkoxysilanes, redistribution, catalysis, dimethyltitanocene.

Keywords

EXPERIMENTAL DATA
ALKOXY
REDISTRIBUTION REACTIONS
TETRAMETHYLCYCLOTETRASILOXANE
EXCELLENT CATALYST
MEDIATED DISPLACEMENTS
DIMETHYLTITANOCENE DIMETHYLTITANOCENE
TIH MEDIATED

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