Abstract
AbstractThe rate constants of the reactions of fluorine atoms with benzene, toluene, p‐xylene and ethylbenzene were studied in a discharge flow reactor at room temperature and low pressure. — The aromatic compounds R were followed under pseudo first order conditions ([R]0 ≪ [F]) by mass spectrometry (MS). The rate constants. F + C6H6 k1 (296 K) = (3.0 ± 0.7). 1013 cm3/mol·s (1). F + C6H5CH3 k2 (296 K) = (4.0 ± 0.8). 1013 cm3/mol·s (2). F + C6H4(CH3)2 k3 (296 K) = (4.2 ± 0.6). 1013 cm3/mol·s (3). F + C6H5C2H5 k4 (296 K) = (4.5 ± 0.6). 1013 cm3/mol·s (4).were obtained. — The products of reaction (1) were C6H5F (80%) and HF (< 8%) and those of reaction (2) were C‐H‐F (50%), C6H5F (20%) and HF (20%). For reaction (3) the exchange mechanism is dominant, C7H7F, C8H9F (65%), and the abstraction contributes 35% (HF). In reaction (4) the abstraction is dominant (HF (50%)) with an exchange pathway of 50% C6H5F and C8H9F.
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