Mechanistic aspects of the thermal formation of halogenated organic compounds including polychlorinated dibenzo‐p‐dioxins. Part IV†: Incorporation of inorganic chlorine into organic matter and thermochemical aromatizations

The pyrolysis and chlorination of petroleum coke in a NaCl‐KCl melt results in the production of CCl₄ and C₆Cl₆. Polychlorinated dibenzo‐p‐dioxins (PCDDs) are produced from the air oxidation and chlorination of coal using HCl or Cl₂. Smoking of tobacco containing ³⁶Cl^e provides CH₃ ³⁶Cl.

At 350°C, the rateof aromatization of 1,3‐cyclohexadiene is negligible as compared to that of 1,4‐cyclohexadiene. The aromatization of the latter diene proceeds through the molecular elimination of hydrogen; while that of 1,3‐cyclohexadiene expecially at higher pressure (10–90 Torr) and at 362–421 °C involves free radical chain mechanism.