UV absorption spectra of CF3CClH and CF3CClHO2 radicals have been investigated. The CF3CClH spectrum was quantified over the wavelength range 225-280 nm. The absorption cross section at 250 nm was (139 +/- 16) x 10(-20) cm(2) molecule(-1). The absorption spectrum for CF3CClO2 was quantified over the wavelength range 225-290 nm, and at 250 nm sigma(250) (nm) = (258 +/- 30) x 10(-20) cm(2) molecule(-1). The kinetics of the reactions of the peroxy radical CF3CClHO2 with NO and NO2 were studied and the derived rate constants were k(3) = (1.0 +/- 0.3) x 10(-11) cm(3) molecule(-1) s(-1) and k(4) = (6.4 +/- 1.5) x 10(-12) cm(3) molecule(-1) s(-1), respectively. The self-reaction rate for the CF3CClHO2 radicals was measured and a value of k(6obs) = (4.4 +/- 0.3) x 10(-12) cm(3) molecule(-1) s(-1) was obtained. The reactions of F atoms with CF3CH2Cl and of CF3CClH with O-2 were found to proceed with rate constants of k(8) = (2.0 +/- 0.6) x 10(-12) cm(3) molecule(-1) s(-1) and k(2) = (1.4 +/- 0.1) x 10-(12) cm(3) molecule(-1) s(-1) respectively. The reaction of CF3CClHO2 radicals with NO gives NO2, and by implication CF3CClHO radicals, which in the atmosphere (a) react with O-2 to give CF3C(O)Cl and (b) decompose to give, most likely, CF3 radicals and HC(O)Cl. In 700 Torr of N-2 diluent the rate constant ratio k(O2)/k(diss) = (2.1 +/- 0.4) x 10(-19) cm(3) molecule(-1). As part of the present work, relative rate techniques were used to measure rate constants for the reactions of Cl and F atoms with CF3CH2Cl of (6.8 +/- 1.2) x 10(-15) and (2.1 +/- 0.5) x 10(-12) cm(3) molecule(-1) s(-1), respectively. All experiments were performed at 296 +/- 2 K.