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- W2014500552 abstract "Abstract The potential energy surface of CO 2 2+ ( 3 Σ g − ) is investigated with HF, MP2, MP4, CBS‐Q, G1, G2MP2, G2, G3B3, and B3LYP/6‐311++G(3df,3pd) methods. Density functional theory shows the lowest dissociation channel of this compound to be the formation of CO + ( 2 Σ + )+O + ( 4 S u ) and to have a barrier of around 2 eV as well as a dissociation energy of around −3.2 eV. Thus we propose that with enough correlation it is possible to accurately predict the energies of dissociation and barrier widths and heights to test for the stability of a particular molecular species. We also propose a refinement of current understanding by observing HOMO–LUMO gaps, Lowdin and Mulliken bond orders (to test for bond orbital overlap and hence qualitatively describe bonding and fragmentation in these complexes) and predicted spectrum for such studies as ZEKE spectroscopy (to study cationic states) and REMPI (to study the first excited states) of these class of molecules and, we hope, provide future insight into larger and more interesting systems. © 2001 John Wiley & Sons, Inc. Int J Quantum Chem, 2001" @default.
- W2014500552 created "2016-06-24" @default.
- W2014500552 creator A5091157671 @default.
- W2014500552 date "2001-12-05" @default.
- W2014500552 modified "2023-10-17" @default.
- W2014500552 title "High level ab initio and density functional theory calculations of the dissociation energies, ionization energies, geometrical variations, and vibrational modes of ground and excited CO<sub>2</sub>, CO<sub>2</sub><sup>+</sup>, and CO<sub>2</sub><sup>2+</sup>" @default.
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- W2014500552 doi "https://doi.org/10.1002/qua.10020" @default.
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