BIMOLECULAR REACTIONS OF RADICAL GENERATION IN CHAIN PROCESSES OF HYDROCARBON HALOGENATION

The subject matter of this publication is radical generation by reacti ons RK+X-2-->R-.+HX+X-. and RH+XY-->R-.+HX+Y-. during chain halogenati on of hydrocarbons. Activation energies and preexponential factors for reactions RH+Cl-2, RH+CINO, RH+ClNO2, RH+ClBr, RH+F-2, RH+FCl, and RH +FBr, where RH denotes aliphatic, alicyclic, unsaturated, and alkyl-ar omatic hydrocarbons (a total of 15 compounds), are evaluated using the parabolic model for reactions of radical abstraction. Competition of radical generation by reaction X-2+RH with X-2 dissociation to atoms i s analyzed. It is shown that the gas-phase bimolecular reactions progr ess faster at temperatures below 1000 K.