A theoretical analysis of the lowest excited states in HNO/NOH and HPO/POH Original Research Article

A theoretical study has been performed on the ground and two lowest excited states of the HNO/NOH and HPO/POH systems. Full geometry optimization was made for all states using the CASSCF method with dynamic correlation effects accounted for by second order perturbation theory (CASPT2). The computed vertical and adiabatic transition energies are in agreement with available experimental data.