Kinetic studies of OH reactions with Iso ‐propyl, Iso ‐butyl, Sec ‐butyl, and Tert ‐butyl acetate

The temperature dependence of the rate coefficients for the OH radical reactions with iso ‐propyl acetate ( k 1 ), iso ‐butyl acetate ( k 2 ), sec ‐butyl acetate ( k 3 ), and tert ‐butyl acetate ( k 4 ) have been determined over the temperature range 253–372 K. The Arrhenius expressions obtained are: k 1 =(0.30±0.03)×10 −12 exp[(770±52)/ T ]; k 2 =(109±0.14)×10 −12 exp[(534±79)/ T ]; k 3 =(0.73±0.08)×10 −12 exp[(640±62)/ T ]; and k 4 =(22.2±0.34)×10 −12 exp[−(395±92)/ T ] (in units of cm 3 molecule −1 s −1 ). At room temperature, the rate constants obtained (in units of 10 −12 cm 3 molecule −1 s −1 ) were as follows: iso ‐propyl acetate (3.77±0.29); iso ‐butyl acetate (6.33±0.52); sec ‐butyl acetate (6.04±0.58); and tert ‐butyl acetate (0.56±0.05). Our results are compared with the previous determinations and discussed in terms of structure‐activity relationships. © 1997 John Wiley & Sons, Inc. Int J Chem Kinet: 29: 683–688, 1997.