Gas phase photochemical decomposition of 1-bromopropane

Abstract

The gas phase photochemical decomposition of 1-bromopropane (lbp) was studied over the temperature range 374–483 K and the pressure range10–95 kPa. Within these ranges the overall kinetics are expressed by:[Formula: see text]where I0 is the incident light intensity. The principal propagation step involves the abstraction of the secondary hydrogen by a bromine atom leading to two major products: propene and hydrogen bromide. Termination involving allyl radical is postulated, a feature that sets this photolysis apart from those of ethyl and neopentyl bromides. The overall activation energy is 33.8 ± 0.8 kJ mol−1 and it leads to Arrhenius parameters for the propagation step [3] of Ea = 29.7 kJ mol−1 and log10A = 9.1 (A in dm3 mol−1 s−1).[Formula: see text]