Kinetics of the gas‐phase reactions of the OH radical with (C 2 H 5 ) 3 PO and (CH 3 O) 2 P(S)Cl at 296 ± 2 K

The kinetics of the gas‐phase reactions of the OH radical with (C 2 H 5 O) 3 PO and (CH 3 O) 2 P(S)Cl and of the reactions of NO 3 radicals and O 3 with (CH 3 O) 2 P(S)Cl have been studied at room temperature. Using a relative rate technique, the rate constants determined for the reactions of the OH radical with (C 2 H 5 O) 3 PO and (CH 3 O) 2 P(S)Cl at 296 ± 2 K and 740 torr total pressure of air were (5.53 ± 0.35) × 10 −11 and (5.96 ± 0.38) × 10 −11 cm 3 molecule −1 s −1 , respectively. Upper limits to the rate constants for the NO 3 radical and O 3 reactions with (CH 3 O) 2 P(S)Cl of <3 × 10 −14 cm 3 molecule −1 s −1 and <2 × 10 −19 cm 3 molecule −1 s −1 , respectively, were obtained. These data are compared and discussed with previous literature data for organophosphorus compounds.