TY - JOUR
T1 - Kinetics of C6H5 radical reactions with 2-methylpropane, 2,3-dimethylbutane and 2,3,4-trimethylpentane
AU - Park, J.
AU - Gheyas, S. I.
AU - Lin, Ming-Chang
PY - 1999/9/1
Y1 - 1999/9/1
N2 - The absolute bimolecular rate constants for the reactions of C6H5 with 2-methyl-propane, 2,3-dimethylbutane and 2,3,4-trimethylpentane have been measured by cavity ring-down spectrometry at temperatures between 290 and 500 K. For 2-methylpropane, additional measurements were performed with the pulsed laser photolysis/mass spectrometry, extending the temperature range to 972 K. The reactions were found to be dominated by the abstraction of a tertiary C-H bond from the molecular reactant, resulting in the production of a tertiary alkyl radical: C6H5+CH(CH3)3→C6H6+t-C4H9 (1) C6H5+(CH3)2CHCH(CH3)2→C6H6 +t-C6H13 (2) C6H5+(CH3)CHCH(CH3)CH(CH3)2 →C6H6+t-C8H17 (3) with the following rate constants given in units of cm3 mol-1 s-1: k1 = 10(11.45±0.18) e-(1512±44)/T k2 = 10(11.72±0.15) e-(1OO7±124)/T k3 = 10(11.83±0.13) e-(428±108)/T.
AB - The absolute bimolecular rate constants for the reactions of C6H5 with 2-methyl-propane, 2,3-dimethylbutane and 2,3,4-trimethylpentane have been measured by cavity ring-down spectrometry at temperatures between 290 and 500 K. For 2-methylpropane, additional measurements were performed with the pulsed laser photolysis/mass spectrometry, extending the temperature range to 972 K. The reactions were found to be dominated by the abstraction of a tertiary C-H bond from the molecular reactant, resulting in the production of a tertiary alkyl radical: C6H5+CH(CH3)3→C6H6+t-C4H9 (1) C6H5+(CH3)2CHCH(CH3)2→C6H6 +t-C6H13 (2) C6H5+(CH3)CHCH(CH3)CH(CH3)2 →C6H6+t-C8H17 (3) with the following rate constants given in units of cm3 mol-1 s-1: k1 = 10(11.45±0.18) e-(1512±44)/T k2 = 10(11.72±0.15) e-(1OO7±124)/T k3 = 10(11.83±0.13) e-(428±108)/T.
UR - http://www.scopus.com/inward/record.url?scp=0033189956&partnerID=8YFLogxK
U2 - 10.1002/(SICI)1097-4601(1999)31:9<645::AID-KIN6>3.0.CO;2-Q
DO - 10.1002/(SICI)1097-4601(1999)31:9<645::AID-KIN6>3.0.CO;2-Q
M3 - Article
AN - SCOPUS:0033189956
SN - 0538-8066
VL - 31
SP - 645
EP - 653
JO - International Journal of Chemical Kinetics
JF - International Journal of Chemical Kinetics
IS - 9
ER -