THE ROVIBRATIONAL ENERGY LEVELS OF THE WATER MOLECULE
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Date
1978
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Publisher
Ohio State University
Abstract
We have improved the perturbation technique used in diagonalizing the non-rigid bender Hamiltonian of Ref. (1). By fitting (in a single fit) the eigenvalues of this effective rotation-bending Hamiltonian to the observed rotation energy levels (J=0 up to 10) in the $(v_{1} , v_{2}, v_{3}) = (0,0,0)$ and (0,1,0) states of $H_{2}O$ and $D_{2}O$ we have refined the equilibrium geometry and force field. We have also calculated these energy levels using the ab initio equilibrium geometry and force constants of Ref. (2), and this is then the first complete ab initio calculation of rovibrational energy levels of high J in a polyatomic molecule to this precision.
Description
$^{1}$A. R. Hoy and P. R. Bunker, J. Mol. Spectrosc. 52, 439 (1974). $^{2}$B. J. Rosenberg, W. C. Ermler and J. Shavitt, J. Chem. Phys, 65, 4072 (1976).""
Author Institution: National Research Council; Department of Chemistry, University of Western Ontario
Author Institution: National Research Council; Department of Chemistry, University of Western Ontario