The kinetics of the CCl2 + Br-2 and CCl2 + NO2 reactions have been studied at temperatures between 266 and 365 K using laser photolysis/photoionization mass spectrometry. Dichloromethylene biradicals were produced by the pulsed laser photolysis of CCl4. The bimolecular rate coefficients of the CCl2 + Br-2 reaction can be described by the Arrhenius expression k(1) = (7.05 +/- 1.75) x 10 (12) exp[(3.52 +/- 0.63) kJ mol (1)/RT] cm(3) molecule (1) s (1). CCl2Br was observed as a primary product of this reaction. Interestingly, the bimolecular rate coefficients of the CCl2 + NO2 reaction were observed to depend weakly on the bath gas density and to possess a negative temperature dependence. (c) 2008 Elsevier B. V. All rights reserved.