In this paper, we present new ideas for computing rovibrational energy levels of molecules composed of two components and apply them to H2O–Cl−. When both components are themselves molecules, Euler angles that specify their orientation with respect to an axis system attached to the inter-monomer vector are used as vibrational coordinates. For H2O–Cl−, there is only one set of Euler angles. Using Euler angles as intermolecular vibrational coordinates is advantageous because in many cases coupling between them and coordinates that describe the shape of the monomers is unimportant. The monomers are not assumed to be rigid. In the most efficient calculation, vibrational wavefunctions of the monomers are used as contracted basis functions. Energy levels are calculated using the Lanczos algorithm.
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14 March 2017
Research Article|
March 08 2017
Using monomer vibrational wavefunctions as contracted basis functions to compute rovibrational levels of an H2O-atom complex in full dimensionality
Xiao-Gang Wang;
Xiao-Gang Wang
a)
Chemistry Department,
Queen’s University
, Kingston, Ontario K7L 3N6, Canada
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Tucker Carrington, Jr.
Tucker Carrington, Jr.
b)
Chemistry Department,
Queen’s University
, Kingston, Ontario K7L 3N6, Canada
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a)
Electronic mail: [email protected]
b)
Electronic mail: [email protected]. Fax: 613-533-6669.
J. Chem. Phys. 146, 104105 (2017)
Article history
Received:
November 11 2016
Accepted:
February 10 2017
Citation
Xiao-Gang Wang, Tucker Carrington; Using monomer vibrational wavefunctions as contracted basis functions to compute rovibrational levels of an H2O-atom complex in full dimensionality. J. Chem. Phys. 14 March 2017; 146 (10): 104105. https://doi.org/10.1063/1.4977179
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