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Gas-phase thermolysis of sulfur compounds. Part IV. n-propyl allyl sulfide

✍ Scribed by Gonzalo Martin; Marcos Ropero

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
345 KB
Volume
14
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The pyrolysis of n‐propyl allyl sulfide has been studied in static and stirred‐flow systems at temperatures between 270 and 400°C. Propene and 2,4,6‐triethyl‐1,3,5‐trithiane were the only reaction products. The order of the reaction was 0.99 ± 0.05 at 377°C. The first‐order rate coefficients followed the Arrhenius equation
The rate coefficients and the product distribution remained unchanged when cyclohexene was used as carrier gas. A molecular mechanism involving a six‐centered cyclic transition state is proposed to explain the present results. This mechanism is further supported by the pyrolysis of 4‐thia‐5‐dideutero‐1‐heptene at 377°C, where only 3‐deuteropropene is formed. The kinetic deuterium isotope effect had a value of 2.6 ± 0.3 at this temperature. The results are compared with those obtained in the pyrolysis of n‐butyl allyl sulfide previously reported.

📜 SIMILAR VOLUMES

Gas-phase thermolysis of sulfur compound
Gas-phase thermolysis of sulfur compounds. Part III: n-butyl 2-propenyl sulfide
✍ Gonzalo Martin; Alberto Drayer; Marcos Ropero; Miguel E. Alonso 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 463 KB

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The pyrolyses of four alkyl allyl sulfides with substituents on the a-C atom of the alkyl moiety have been studied in a stirred-flow system over the temperature range 340-400°C and pressures between 2 and 12 torr. The only products formed are propene and thioaldehydes. The reactions showed first-ord