Theoretical and experimental investigation of the C2HÂ +Â SO2 reaction over the range TÂ =Â 295-800Â K

► The rate constant of C2H + SO2 over T = 295 to 800 K is kSO2(T) = (0.86 ± 0.08)T3.80±0.13 exp[−(1222 ± 79)/T]. ► The rate constants are moderately high and show negative temperature dependence. ► C2H + SO2 plays a significant role in combustion and interstellar environments, where its main products will be HCCO + SO.