ISSN:
0941-1216
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Kinetic Investigation of the Platinum-catalysed Hydrosilylation of Vinylsiloxanes with HydrogensiloxanesA kinetic investigation of the platinum-catalysed hydrosilylation of monofunctional oligomeric vinylsiloxanes by monofunctional oligomeric hydrogensiloxanes was performed under stoichiometric conditions with use of quantitative 1H-NMR spectrometry. The reaction rate up to 50% conversion can be expressed by v=k [Pt]. During further hydrosilylation the kinetic changed to second order. No induction period was observed. A hydrogensiloxane with a dimethylsilyl end group gives much higher rates than a siloxane with a methylsiloxy group. The main reactions of all hydrosilylations, determined by GC-MS and 29Si-NMR, are β-additions. Less then 5% α-products are obtained.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19943360306
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