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

Abstract

Absolute rate coefficients and branching ratios for production of HCl( v=1) are measured for the reactions of Cl with (CH 3) 3CH, CH 3OH, CH 3CHO, and C 6H 5CH 3. The fractions of HCl( v=1) produced ( f=HCl( v=1)/HCl (total)) are f((CH 3) 3CH)=0.03±0.02, f(CH 3OH)=0.12±0.02, f(CH 3CHO)=0.54±0.04, and f(C 6H 5CH 3)=0.47±0.03; a significant fraction of the exothermicity appears in HCl vibration. Rate coefficients at 295 K are k((CH 3) 3CH)=(1.49±0.02)×10 −10, k(CH 3OH)=(5.6±0.2)×10 −11, k(CH 3CHO)=(8.3±0.1)×10 −11, and k( C 6 H 5 CH 3)=(6.1±0.2)×10 −11 cm 3 molecule −1 s −1 .