THE RIGIDLY-BENDING RIGID-ROTOR HAMILTONIAN AS APPLIED TO HCN AND $H_{2}O$
P. R. Bunker, John M. R. Stone · The Knowledge Bank (The Ohio State University) · 1971
The rovibrational Hamiltonian for a triatomic molecule, as derived by Hougen, Bunker and Johns1, has been used to calculate the rovibrational energy levels of the linear ground state of HCN, the first excited electronic state of HCN (in which the molecule is bent), and the ground state of $H_{2}O$. The success of this simple model in predicting the rotation-bending energy levels of these molecules and their isotopic variants will be discussed. Possible modifications which could be added to make the model more sophisticated will be suggested. New experimental results on the A-X band systems of HCN and DCN, which were obtained so that we could test the model more fully, will be reported.