Kinetics of phenyl radical reactions with selected cycloalkanes and carbon tetrachloride

T. Yu, Ming-Chang Lin*


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57 引文 斯高帕斯(Scopus)


The kinetics of C6H5 reactions with c-C5H10, c-C6H12, c-C7H14, c-C8H16, and CCl4 have been studied by means of the cavity-ring-down technique in the temperature range 297-523 K. The rates of these reactions were monitored by measuring either the decay of C6H5 at 504.8 nm or the formation of C6H5O2 at 496.4 nm (or 510 nm) when a small, constant amount of O2 was added to the slow-flowing reaction mixtures. Our absolute rate constants determined at several specific temperatures compare reasonably well with those measured in solution by either a direct probing (as for CCl4) or an indirect, relative rate method (as for the cycloalkanes). The effects of temperature on the reactions with CCl4, c-C5H10, and c-C6H12 have been investigated and our results give rise to the following Arrhenius equations: kCCl4 = 10-11.70±0.05±á°5 exp[(-1379 ± 56)/T]; kc-c5H10 = 10-11.35±0.08 exp[(-2039 ± 66)/T]; kc-C6Hl2 = 10-11.10±024 exp[(-1913 ± 191)/T], where kx's are given in units of cm3/molecule·s. Our averaged value of kCCl4 at 333 K, 3.40 × 10-14 cm3/molecule·s, was used to evaluate many rate constants for C6H5 reactions with hydrocarbons (RH) of interest to combustion using previously determined kRH/kCCl4 ratios in solution.

頁(從 - 到)8599-8603
期刊Journal of Physical Chemistry
出版狀態Published - 1 1月 1995


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