Abstract

The rate constant for the reaction HCO + HCO → CH 2O + CO was measured at temperatures between 298 and 475 K. The formyl radicals were produced by flash photolysis of formaldehyde and were detected by resonance absorption at 614.5 nm. At low pressure and room temperature, k 1 = (3.35 ± 0.85) × 10 −11 cm 3 molecule −1 s −1. There is no discernable variation of k 1 with temperature up to 475 K.

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