The Rotation-Vibration Energies of Tetrahedrally Symmetric Pentatomic Molecules. II

A general discussion of a method which may be used to obtain the first-order Coriolis splitting of the harmonic and combination states of ${\nu }_3$ and ${\nu }_4$ is presented. The method is applied to obtain these splittings of $2{\nu }_3$, $2{\nu }_4$ and ${\nu }_3+{\nu }_4$ and to derive the stabilized wave functions for these states. With these functions the selection rules and the elements of the matrix of the second-order Hamiltonian $H^{{\mathrm{}\left(2\right)\mathrm{}}^{\prime }}$ have been calculated for these states.