Infrared laser absorption measurements of HCl(υ=1) production in reactions of Cl atoms with isobutane, methanol, acetaldehyde, and toluene at 295 K

Absolute rate coefficients and branching ratios for production of HCl(v = 1) are measured for the reactions of Cl with (CH3)(3)CH, CH3OH, CH3CHO, and C6H5CH3. The fractions of HCl(v = 1) produced (f = HCl(v = 1)/HCl (total)) are f ((CH3)(3)CH) = 0.03 +/- 0.02, f (CH3OH) = 0.12 +/- 0.02, f (CH3CHO) = 0.54 +/- 0.04, and f(C6H5CH3) = 0.47 +/- 0.03; a significant fraction of the exothermicity appears in HCl vibration. Rate coefficients at 295 K are k((CH3)(3)CH) (1.49 +/- 0.02) x 10(-11), k(CH3OH) = (5.6 +/- 0.2) x 10(-11), k(CH3CHO) = (8.3 +/- 0.1) x 10(-11), and k(C6H5CH3) (6.1 +/- 0.2) x 10-11 cm(3) molecule(-1) s(-1). (C) 2002 Elsevier Science B.V. All rights reserved.