A centrifugal-sudden distorted wave study of the Cl+HCl r arrow ClH+Cl reaction using a tight-bend'' potential energy surface

Journal Article · Sun Apr 15 04:00:00 EDT 1990 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.457706· OSTI ID:6945505

Schatz, G C ^[1]; Amaee, B; Connor, J N.L. ^[2]

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1. Theoretical Chemistry Group, Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (USA)
2. Department of Chemistry, University of Manchester, Manchester, M13 9PL, United Kingdom (GB)

Quantum calculations of product rotational distributions, cross sections and rate coefficients have been performed for the Cl+HCl{r arrow}ClH+Cl reaction using the centrifugal-sudden distorted-wave (CSDW) technique. The CSDW method has been shown to be nearly exact at low total energies where the total reaction probability for each partial wave is small. The potential energy surface used is the extended London--Eyring--Polanyi--Sato surface No. 3 of Persky and Kornweitz. This surface has a tighter bending potential near the saddle point than many of the other commonly used Cl+HCl potentials. This difference in bending potential is found to have a profound influence on the product rotational distributions, producing much colder HCl molecules than is the case for the other potentials. In contrast, quantities such as rate coefficients and cumulative reaction probabilities are found to be only weakly sensitive to the strength of the bending potential. Comparison with quasiclassical trajectory results shows reasonable agreement with respect to the shape of the rotational distributions, but the magnitudes of the cross sections and rate coefficients are substantially different.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6945505
• Journal Information: Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 92:8; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CHEMICAL REACTION KINETICS
CHLORINE
CROSS SECTIONS
DATA
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL DENSITY
EXCITED STATES
HALOGENS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KINETICS
NONMETALS
NUMERICAL DATA
REACTION KINETICS
ROTATIONAL STATES
SUDDEN APPROXIMATION
THEORETICAL DATA