Alkyl Fluorocompounds

Some of the above alkyl halides contain fluorine. In the case of CF3C1 the activation energy indicated that two negative-ion curves contribute to the dissociative thermal electron attachment. In 1997 S. R. Sousa and S. E. Bialkowski carried out a classic study of the ECD temperature dependence of alternative fluorocarbon freon replacements [16]. The study used a commercial ECD and the fundamental concepts discussed in this book to obtain rate constants and energies for compounds. One of these, CF2C12, was used as an internal standard in all the measurements. The 

The two molecules with a single positive slope (CHC1F2 and CF3CH2F) and the one with two slopes (CF3CHF2) indicate nondissociative thermal electron attachment. The negative slope for the latter is the activation energy for electron attachment to the ground state. There are no reasonable dissociative pathways. 

TABLE 11.5 ECD and NIMS Parameters for Freon Substitutes and Fluorocarbons [16] 

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