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Title: The Attractive Quartet Potential Energy Surface for the CH(a 4.SIGMA.-) + CO Reaction: A Role for the a 4A'' State of the Ketenyl Radical in Combustion?
Authors: Hu, Ching-Han;Schaefer, H. F.;Hou, Z.;Bayes, K. D.
Contributors: 化學系
Date: 1993-07
Issue Date: 2012-05-03T06:15:45Z
Publisher: American Chemical Society
Abstract: Ab initio quantum mechanical techniques, including the self-consistent-field (SCF), single and double excitation
configuration interaction (CISD), single and double excitation coupled cluster (CCSD), and the single, double, and
perturbative triple excitation coupled cluster [CCSD(T)] methods have been applied for the study of the HCCO(a 4A")
energy hypersurface. Rate constant measurements suggest an attractive potential for the reaction of CH(a Q-) with
CO. A vanishingly small energy barrier is predicted here in the CH(a Q-) + CO reaction channel. We propose that
a spin-forbidden electronic deactivation of CH(a Q-) might occur through an intersystem crossing involving the a 4A''
state of HCCO. The energetics and the geometries of the reactants and products on both quartet and doublet energy
surfaces are presented. The relationship between this research and experimental combustion chemistry is explored.
Relation: J. Am. Chem. Soc., 115(15): 6904-6907
Appears in Collections:[Department of Chemistry] Periodical Articles

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