Kinetic study of OH radical reactions with chlorobutane isomers at 298 K

The rate constant of hydroxyl radical reactions with the four chlorobutane isomers have been determined using a fast flow reactor. The values in cm3 molecule−1 s−1 are: k1 (OH+1-chlorobutane)=(2.00±0.15)×10−12, k2 (OH+2-chlorobutane)=(2.45±0.30)×10−12, k3 (OH+1-chloro-2-methylpropane)=(1.95±0.20)×10−12, k4 (OH+2-chloro-2-methylpropane)=(0.45±0.10)×10−12. The quoted errors include both statistical deviations (2σ, generally <5%) and estimated systematic uncertainties (10–20%). Adjustments of structure activity relationships are suggested.