Reactions of Fluorine Atoms with Benzene, Fluorobenzene, and Chlorobenzene

Abstract

Benzene and its derivatives are extremely important substances in modern chemical technologies. However, emissions of these substances have an extremely negative impact on the atmosphere and ecology. Benzene is a substance of the second class of danger and its effect on the human body is fraught with serious consequences. In the event of man-made disasters, it is an urgent task to convert benzene into less toxic substances. In this study, using a low-pressure flow reactor, the kinetic patterns of the reactions of atomic fluorine with benzene, fluorobenzene, and chlorobenzene at a temperature of T = 293 K and a pressure of 0.8–1.3 Torr are established. The concentrations of reagents and products are controlled by molecular beam mass spectrometry. To determine the reaction rate constants, the method of competing reactions is used. The reaction of fluorine atoms with cyclohexane is chosen as a competitor. As a result of the analysis using the experimental and published data, the following values of the rate constants of the studied reactions are obtained.