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 (R O CH2 O R, 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 |