The gas-phase pyrolysis of several aliphatic 1,3-diols. The kinetic and mechanism of 2,4-dimethyl-2,4-pentanediol

doi:10.1002/(SICI)1097-4601(1997)29:11<851::AID-KIN6>3.0.CO;2-L

Paper

The gas-phase pyrolysis of several aliphatic 1,3-diols. The kinetic and mechanism of 2,4-dimethyl-2,4-pentanediol

Published Jan 1, 1997 · DOI · G. Chuchani, R. Dominguez, A. Rotinov

International Journal of Chemical Kinetics

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Abstract

Satisfactory kinetic determinations of several aliphatic 1,3-diols were difficult to obtain. Moreover the product distributions from each of these substrates suggest complex parallel mechanisms. However, the elimination kinetic of 2,4-dimethyl-2,4-pentanediol has been measured over the temperature range of 419.7–459.9°C and pressure range of 47–115 torr. The reaction carried out by employing a static system, in seasoned vessel, and in the presence of the free-radical inhibitor propene, proved to be homogeneous, unimolecular, and follows a first-order rate law. The products are acetone, isobutene, and H2O. The rate coefficient is expressed by the following Arrhenius equation: log k1(s−1)=(12.53±0.58)−(217.3±8.0) kJ mol−1 (2.303RT)−1. The pyrolytic elimination of this substrate is believed to proceed through a concerted six-membered cyclic transition-state type of mechanism. © 1997 John Wiley & Sons, Inc. Int J Chem Kinet 29: 851–854, 1997

Study Snapshot

The pyrolytic elimination of 2,4-dimethyl-2,4-pentanediol follows a concerted six-membered cyclic transition-state type of mechanism, producing acetone, isobutene, and H2O at temperatures ranging from 419.7

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

The gas-phase pyrolysis of several aliphatic 1,3-diols. The kinetic and mechanism of 2,4-dimethyl-2,4-pentanediol

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