AbstractThe reactions\documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Cl}\,\, + \,\,{\rm RI} \to {\rm ICI}\,\, + \,\,{\rm R} $$\end{document}(R = CF3, C2F5, andi,‐C3F7) have been studied competitively in the gas phase over the range of 27–231°C. The following Arrhenius parameters were obtained:TextlogA,(cm3/mol · s)E,(kJ/mol)R = CF313.99 ± 0.2117.1 ± 2.0R = C2F513.97 ± 0.2011.5 ± 2.0R =i,‐C3F714.18 ± 0.2010.2 ± 2.0The above data lead to bond dissociation energiesD(R‐I) which are compared with previous published results. The following values are recommended:D,(CF3‐I) = 224,D,(C2F5‐I) = 219, andD,(i,