The thermal decomposition of cis-2,6-dimethyl-3,6-dihydro-2H-pyran
- 1 January 1979
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 10,p. 1460-1462
- https://doi.org/10.1039/p29790001460
Abstract
The pyrolysis of the title compound has been studied in the gas phase, in the temperature range 300–351°C. The decomposition yields acetaldehyde and trans-penta-1,3-diene by a homogeneous process which is kinetically first order and probably unimolecular. The rate constants fit the Arrhenius equation (i). log k/s–1= 13.91 ± 0.10 –(196 300 ± 1 200 J mol–1)/RTIn10 (i) Consideration of the energetics of the process as well as the stereospecific nature of the products lead to the conclusion that the decomposition is a concerted process.Keywords
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