Synthesis, properties, and the ring-ring transformation reactions of cyclic siloxanes incorporating skeletal boron atoms: x-ray crystal structures of the strained …

DA Foucher, AJ Lough, I Manners

Index: Foucher, Daniel A.; Lough, Alan J.; Manners, Ian Inorganic Chemistry, 1992 , vol. 31, p. 3034 - 3043

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Citation Number: 59

Abstract

The cyclic boratrisiloxanes (PhBO)(RR'Si0) 2 (1, R= R'= Me; 2, R= Me, R'= Ph; 3, R= R'= Ph) have been prepared via the reaction of the dichlorodisiloxanes 1, 3-C1RR'SiOSiRR'Cl with phenylboric acid in the presence of NEt3 as an HCl acceptor. Similar procedures using the appropriate a, o-dichlorosiloxanes CIMe2Si (OSiMe2),, OSiMe2Cl (n= 1 or 2) afforded the boracyclotetrasiloxane (PhBO)(MezSiO) s (4) and the boracyclopentasiloxane (PhBO)( ...