Add time:08/01/2019 Source:sciencedirect.com
The catalytic behavior of insoluble polyorganosiloxane gels containing amino groups or phosphonium salts was examined in the reaction of oxiranes with S-phenyl thioacetate. The catalysts, poly(p-chloromethyl)phenylsiloxanes containing phosphonium salts, have high catalytic activity and the observed rate constant (kobsd) of the reaction shows a linear relation with the initial concentration of catalyst.
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