Kinetics of the reactions of bromine atoms with a series of aliphatic aldehydes at 298 K

Abstract

AbstractThe kinetics of the reactions of Br(2P3/2) with selected aldehydes, i.e. ethanal (l), propanal (2). 2‐methyl‐pro‐panal (3), 2,2‐dhethyl‐propanal (4) and trichloroacetaldehyde (5) were studied at 298±2 K. Rate constants for overall reactions were measured using the fast flow technique with resonance fluorescence detection of Br. Complementary determinations were carried out by the laser flash photolysis method. The following rate constants were obtained in the kinetic measurements (±2σ): k1=(2.1±0.2)×1012, k2=(4.3±0.4)×1012, k3=(6.3±1.4)×1012, k4=(8.5±0.8)×1012, k5≤1×109 all in cm3 mol−1 s−1 units.The probable mechanism for the reactions of bromine atoms with aliphatic aldehydes has been discussed.