The rate of cross combination of difluoroamino-radicals with ethyl and isopropyl radicals

Abstract

The rates of the cross combination reactions of difluoroamino-radicals with ethyl and iso-propyl radicals have been determined by the photolysis of the dialkyl ketone in the presence of small concentrations of tetrafluorohydrazine. The rate constants were found to be given by: [graphic omitted].

These cross combination parameters have been compared with other radical–difluoroamino-radical cross combination reactions. From thermodynamic data the Arrhenius parameters for the decomposition reaction of the corresponding alkyl difluoroamines have been evaluated. The primary step in the photolysis of diethyl ketone is found to give a propionyl radical and an ethyl radical rather than giving directly two ethyl radicals and carbon monoxide.