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Kinetics and Energy Transfer in the Thermal Decomposition of 2-Methyloxetane and 3-Methyloxetane

DOI: 10.1039/ft9908600021

Source and publish data:

Journal of the Chemical Society - Faraday Transactions p. 21 - 26 (1990)

Update date:2022-08-10

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Authors:

Zalotai, LajosZalotai, Lajos

Berces, TiborBerces, Tibor

Marta, FerencMarta, Ferenc

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Article abstract of DOI:10.1039/ft9908600021

The thermal decomposition of 2-methyloxetane and 3-methyloxetane has been studied between 660 and 760 K in the pressure range 0.01-3 kPa.In the pressure-independent range, rate coefficient expressions and were determined for 2-methyloxetane decomposition into C3H6 + HCHO (k1) and C2H4 + CH3CHO (k2), respectively, while for 3-methyloxetane decomposition into C3H6 + HCHO (k3) the following kinetic parameters were obtained: .The pressure dependence of the homogeneous decomposition rate and the effiency of the gas-phase collisional energy transfer have been studied at 743 K.A value of <ΔE>d = 1500 +/- 300 cm-1 was extracted from the investigation of the pressure dependence of the two-channel decomposition of 2-methyloxetane.Finally, the effiency of the surface-gas energy transfer has been studied by the 'variable encounter method' in the range 750-1100 K.At 750 K the average energy transferred per collision with the wall was determined to be 2600 cm-1 for both methyloxetanes; however, <ΔE'> decreased considerably with increasing temperature.The results on the collision effiencies were discussed and compared with literature data for related molecules.

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