The reactions of photochemically generated Cl (2 PJ) atoms with a number of fluorohydrocarbons have been investigated in the temperature range 8–95° C by the competitive photochlorination technique using CH4 as a primary standard. Relative and absolute rate parameters are reported for CH3F, CH2F2, CH3CH2F, CH2FCH2F, CH3CHF2, CH3CF3, CH2FCHF2, CHF2CHF2, and several auxiliary reactions including ...