Kinetic study of the reaction of OH with a series of acetals at 298 � 4 K

Abstract

Rate coefficients have been measured at 298 ± 4 K and 1000 mbar total pressure for the reactions of OH with a series of symmetrical acetals (ROCH2OR, R = C1 to C4) using a relative kinetic technique. The investigations have been performed in a laboratory photoreactor and also in the large outdoor EUPHORE simulation chamber facility in Valencia, Spain. The following rate coefficients (in units of 10−11 cm3 molecule−1 s−1) have been obtained: dimethoxy methane (R = CH3), 0.49 ± 0.02; diethoxy methane (R = CH3CH2), 1.84 ± 0.18; di-n-propoxy methane (R = CH3CH2CH2), 2.63 ± 0.49; di-iso-propoxy methane (R = (CH3)2CH), 3.93 ± 0.48; di-n-butoxy methane (R = CH3CH2CH2CH2), 3.47 ± 0.42; di-iso-butoxy methane (R = (CH3)2CHCH2), 3.68 ± 0.57; di-sec-butoxy methane (R = CH3CH2C(CH3)H), 4.68 ± 0.05. © 1999 John Wiley & Sons, Inc. Int J Chem Kinet 31: 797–803, 1999