Abstract
The stable products of the reaction between oxygen and cyclopropane are carbon monoxide and water with small amounts of carbon dioxide, methane and hydrogen. The only organic intermediate formed is formaldehyde, the pressure of which during an experiment rose to a maximum at the time of the maximum rate. This maximum pressure was proportional to the initial cyclopropane pressure and independent of the initial oxygen pressure unless that was very low. Addition of formaldehyde initially reduced the induction period but had little effect on the maximum rate. The initial addition of water slightly catalyzed the reaction, but this was a surface effect. A detailed reaction scheme, which explains the kinetic and analytical results, is proposed, and the various elementary reactions composing it discussed. It is suggested that formaldehyde was formed by means of the production and decomposition of cyclopropylperoxyl (C 3 H 5 O 2 ) radicals and was responsible for the delayed branching (McEwan & Tipper 1953); and that the reaction chains involved OH and HO 2 radicals, termination having occurred by reaction of the latter on the walls.
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Schedule a callMore From: Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
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