Kinetic and IR Spectroscopic Studies of Formyl Bromide (HCOBr) Formed via the Reaction HCO + Br2 -> HCOBr + Br

Article abstract of DOI:10.1021/j100165a033

An FTIR spectroscopic study of the visible photolysis of Br2-HCHO-N2 mixtures has shown that the major carbon-containing product is HCOBr, formed via Br + HCHO -> HCO + HBr followed by HCO + Br2 -> HCOBr + Br.HCOBr was found to be highly susceptible to heterogeneous decomposition to CO + HBr.This photochemical method has been used for the quantitative in situ preparation of HCOBr and IR spectra have been obtained of the ν₁-ν₄ and ν₆ bands of HCOBr, DCOBr, and H(13)COBr.The spectra observed are consistent with a planar structure.HCOBr was also detected in the photolysis of Br2-C2H2-O2 mixtures and the kinetic analysis of its yield as a function of the C2H2 conversion has shown the rate constant for the Br + HCOBr reaction to be <4 x 1E-14 cm³ molecule^-1 s^-1.