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Shock wave studies of the pyrolysis of fluorocarbon oxygenates. II. The thermal dissociation of C4F8O.

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Sölter,  L.
Emeritus Group of Spectroscopy and Photochemical Kinetics, MPI for Biophysical Chemistry, Max Planck Society;

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Tellbach,  E.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Troe,  J.
Emeritus Group of Spectroscopy and Photochemical Kinetics, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Cobos, C. J., Hintzer, K., Sölter, L., Tellbach, E., Thaler, A., & Troe, J. (2017). Shock wave studies of the pyrolysis of fluorocarbon oxygenates. II. The thermal dissociation of C4F8O. Physical Chemistry Chemical Physics, 19(4), 3159-3164. doi:10.1039/c6cp06822g.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-E157-6
Abstract
The thermal decomposition of octafluorooxalane, C4F8O, to C2F4 + CF2 + COF2 has been studied in shock waves highly diluted in Ar between 1300 and 2200 K. The primary dissociation was shown to be followed by secondary dissociation of C2F4 and dimerization of CF2. The primary dissociation was found to be in its falloff range and falloff curves were constructed. The limiting low and high pressure rate constants were estimated and compared with modelling results. Quantum-chemical calculations identified possible reaction pathways, either leading directly to the final products of the reaction or passing through an open-chain CF2CF2CF2 intermediate which dissociates in a second step.