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Nonhydrolytic Synthesis of Branched Alkoxysiloxane Oligomers Si[OSiH(OR) 2 ] 4 (R=Me, Et)
Author(s) -
Wakabayashi Ryutaro,
Kawahara Kazufumi,
Kuroda Kazuyuki
Publication year - 2010
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201001640
Subject(s) - silanol , siloxane , alkoxy group , chlorosilane , oligomer , chemistry , condensation reaction , polymer chemistry , hydrolysis , lewis acids and bases , organic chemistry , silicon , catalysis , polymer , alkyl
Beyond silanol : A branched siloxane oligomer bearing terminal dialkoxysilyl groups was nonhydrolytically synthesized by direct alkoxysilylation of a tetraalkoxysilane with a chlorodialkoxysilane in the presence of the Lewis acid BiCl 3 (see scheme). The reaction proceeds without the formation of intermediate silanol groups, and provides a selective route for siloxane‐based oligomers.