A priori effective rotational Hamiltonians. Rotational spectra of some simple molecular models

A method proposed earlier [S.V. Petrov, Spectry, Letters 26 (1993) 47; Proc. SPIE 2205 (1994) 173] for the study of the qualitative features of molecular ro-vibrational dynamics is used for calculations of ro-vibrational energies. As examples, the ro-vibrational levels of Na2 and KCN are calculated.