Accurate theoretical near-equilibrium potential energy and dipole moment surfaces of HgClO and HgBrO

Details Accurate theoretical near-equilibrium potential energy and dipole moment surfaces of HgClO and HgBrO Accurate theoretical near-equilibrium potential energy and dipole moment surfaces of HgClO and HgBrO

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jchph.120.6585b&link_type=abstract

Journal of Chemical Physics, Volume 120, Issue 14, pp. 6585-6592 (2004).

Physics

Chemical Physics

4

Potential Energy Surfaces For Excited Electronic States, Electric And Magnetic Moments, Polarizability, And Magnetic Susceptibility, Coupled-Cluster Theory, Relativistic And Quantum Electrodynamic Effects In Atoms And Molecules, Vibration-Rotation Analysis, Infrared Spectra, Vibronic, Rovibronic, And Rotation-Electron-Spin Interactions, Perturbation Theory, Vibrational Analysis

Scientific paper

The complexes HgBrO and HgClO have been previously determined by ab initio methods to be strongly bound and were suggested to be important intermediates during mercury depletions events observed in the polar troposphere. In the present work accurate near-equilibrium potential energy surfaces (PESs) of these species are reported. The PESs are determined using accurate coupled cluster methods and a series of correlation consistent basis sets with subsequent extrapolation to the complete basis set limit. Additive corrections for both core-valence correlation energy and relativistic effects are also included. The anharmonic ro-vibrational spectra of HgBrO and HgClO have been calculated in variational calculations. Strong infrared band strengths are predicted for all fundamentals in these species. The spin-orbit splitting dominates over the vibronic coupling effect in both HgClO and HgBrO. The Renner-Teller vibronic energy levels corresponding to the bending mode of these molecules are calculated via perturbation theory.

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