Vibrational energy levels calculations

For any work of even greater accuracy, one would definitely have to contend with the deficiencies of the vibrational second-order perturbation theory used for the analysis, and apply a more accurate variational method for rovibronic energy level calculation of molecules (see Vibrational Energy Level Calculations). At present, the applicability of such methods to a system with more than four atoms is rather limited. 

Classical Dynamics of Nonequilibrium Processes in Fluids Integrating the Classical Equations of Motion Control of Microworld Chemical and Physical Processes Mixed Quantum-Classical Methods Multiphoton Excitation Non-adiabatic Derivative Couplings Photochemistry Rates of Chemical Reactions Reactive Scattering of Polyatomic Molecules Spectroscopy Computational Methods State to State Reactive Scattering Statistical Adiabatic Channel Models Time-dependent Multiconfigurational Hartree Method Trajectory Simulations of Molecular Collisions Classical Treatment Transition State Theory Unimolecular Reaction Dynamics Valence Bond Curve Crossing Models Vibrational Energy Level Calculations Vibronic Dynamics in Polyatomic Molecules Wave Packets. 

Circular Dichroism Vibrational Infrared Data Correlations with Chemical Structure Infrared Spectra Interpretation by the Characteristic Frequency Approach Intensities of Infrared and Raman Bands Normal Modes Symmetry in Chemistry Vibrational Energy Level Calculations. 

Classical Trajectory Simulations Final Conditions Integrating the Classical Equations of Motion Rates of Chemical Reactions Statistical Adiabatic Channel Models Transition State Theory Vibrational Energy Level Calculations Ylave Packets. 

Hydrogen Bonding 1 Reaction Path Following Symmetry in Chemistry Transition Structure Optimization Techniques Vibrational Energy Level Calculations. 

Weakly bound systems from van der Waals to strong hydrogen bonds are treated theoretically in ECC in the article by Bogumil Jeziorski Intermolecular Interactions by Perturbation Theory). Related articles are those of Tucker Carrington Vibrational Energy Level Calculations), Wolfgang Domcke Vibronic Dynamics in Polyatomic Molecules), and of Martin Quack Multiphoton Excitation). 

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