TY - JOUR
T1 - Carbon-13 kinetic isotope effects of importance to atmospheric science and their temperature dependence
AU - Lin, Hai
AU - Zhao, Yan
AU - Ellingson, Benjamin A.
AU - Pu, Jingzhi
AU - Truhlar, Donald G.
PY - 2004
Y1 - 2004
N2 - The greenhouse gas methane plays an important role in modeling global climate changes. The oxidation of CH4 by OH radical is the major sink of atmospheric methane in the troposphere. A theoretical study of the carbon-13 kinetic isotope effect (KIE) and its temperature dependence for the reaction OH + CH4 → H2O + CH3. The KIE values at various atmospherically significant temperature were determined by direct dynamics using variational transition state theory with multidimensional tunneling contributions. The potential energy surfaces were generated at a number of different levels of theory including both explicitly correlated wavefunctions and hybrid and doubly hybrid density functional theory methods. Factorization of the KIE into different contributions (potential energy, translation, rotation, vibration, and tunneling) provided insights into the origin of the KIE. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA, 8/22-26/2004).
AB - The greenhouse gas methane plays an important role in modeling global climate changes. The oxidation of CH4 by OH radical is the major sink of atmospheric methane in the troposphere. A theoretical study of the carbon-13 kinetic isotope effect (KIE) and its temperature dependence for the reaction OH + CH4 → H2O + CH3. The KIE values at various atmospherically significant temperature were determined by direct dynamics using variational transition state theory with multidimensional tunneling contributions. The potential energy surfaces were generated at a number of different levels of theory including both explicitly correlated wavefunctions and hybrid and doubly hybrid density functional theory methods. Factorization of the KIE into different contributions (potential energy, translation, rotation, vibration, and tunneling) provided insights into the origin of the KIE. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA, 8/22-26/2004).
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M3 - Article
AN - SCOPUS:5044243567
VL - 228
SP - PHYS-81
JO - ACS National Meeting Book of Abstracts
JF - ACS National Meeting Book of Abstracts
SN - 0065-7727
IS - 2
T2 - Abstracts of Papers - 228th ACS National Meeting
Y2 - 22 August 2004 through 26 August 2004
ER -