Vibrational Effects on Molecular Properties in Large Molecules

Abstract

We discuss an approach for calculating vibrational wave functions, eigenenergies and zero-point vibrational corrections to molecular properties. For simplicity the detailed theory is presented for a diatomic molecule, but the formulas for a general polyatomic molecule are also given. The approach has been implemented so as to allow vibrational corrections to be calculated for large molecules. We discuss recent applications of the model for calculating zero-point vibrational corrections to properties such as nuclear shielding constants, magnetizabilities, polarizabilities and optical rotation, and the use of this approach for obtaining accurate vibrational frequencies for bimolecular complexes.