SCHEDULED MAINTENANCE:
The rate constant ka of the initiation step in the reaction of 4a,4b-dihydrophenanthrene (PH2) with molecular oxygen: PH2+ O2→ PH·+ HO2· was measured over the temperature range 263–191 K. A significant positive deviation from the Arrhenius dependence, In ka= In A–Ea/RT, was observed, and is ascribed to quantum-mechanical tunnelling.
A. Bromberg, K. A. Muszkat, E. Fischer and F. S. Klein, J. Chem. Soc., Perkin Trans. 2, 1972, 588 DOI: 10.1039/P29720000588
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