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Conical and glancing Jahn-Teller intersections in the cyclic trinitrogen cation
Vadim A Mozhayskiy1, Dmitri Babikov, Anna I Krylov
1Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA.
The Journal of Chemical Physics
|June 21, 2006
Summary
This study characterizes the electronic states of cyclic nitrogen trimer cation (N3+), detailing its Jahn-Teller distortions and excited states. The ionization potential was calculated to be 10.595 eV, aligning with experimental findings.
Area of Science:
- Quantum chemistry
- Molecular spectroscopy
- Theoretical chemistry
Background:
- Cyclic nitrogen trimer cation (N3+) is a unique molecular system.
- Understanding its electronic structure is crucial for theoretical chemistry.
- Jahn-Teller effects significantly influence degenerate electronic states.
Purpose of the Study:
- To characterize the ground and electronically excited states of cyclic N3+.
- To investigate Jahn-Teller distortions and their impact on excited states.
- To compute key molecular properties including excitation energies and ionization potential.
Main Methods:
- Computational quantum chemistry methods were employed.
- Electronic states were analyzed at equilibrium geometry and along distortion pathways.
- Calculations included optimized structures, excitation energies, frequencies, and ionization potential.
Main Results:
- Lowest excited states arise from HOMO-LUMO excitations, leading to degenerate states.
- Interaction of degenerate states results in a glancing Jahn-Teller intersection.
- HOMO-2 -> LUMO excitations yield regular Jahn-Teller states.
- Calculated ionization potential is 10.595 eV, matching experimental data.
Conclusions:
- The electronic structure and Jahn-Teller effects of N3+ were elucidated.
- Computed properties, particularly the ionization potential, validate the theoretical approach.
- This work provides a detailed characterization of N3+ electronic states.