The CCl3 + CH3 (1) cross-radical reaction was studied by laser photolysis/photoionization mass spectroscopy. Overall rate constants were obtained in direct real-time experiments in the temperature region 306-800 K and bath gas (helium) density region (3-12) x 10(16) atoms cm(-3). The observed rate constant of reaction 1 is independent of temperature and equal to (2.05 +/- 0.30) x 10(-11) cm(3) molecule(-1) s(-1). Formation Of C2H2Cl2 and C2H3Cl2 was detected; however, only the C2H3Cl2 radical can be identified as a product of reaction I on the basis of the experimental information since the contribution of reaction 1 to the signal Of C2H2Cl2 could not be separated from that of the reaction of CCl2 with CH3 (CCl2 being a minor product of photolysis of all precursors Of CCl3 used). The experimental values of the rate constant are in reasonable agreement with the prediction based on the "geometric mean rule". A separate experimental attempt to determine the rate constant of the high-temperature CCl3 + O-2 (10) reaction resulted in the upper limit of k(10) less than or equal to 3.0 x 10(-16) cm(3) molecule(-1) s(-1) at 800 K.