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Moorby RE, Parravicini V, Alessio M, Jagau TC. Signatures of s-wave scattering in bound electronic states. Phys Chem Chem Phys 2024; 26:6532-6539. [PMID: 38323476 DOI: 10.1039/d4cp00181h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
We compute EOM-EA-CCSD and EOM-EA-CCSDT potential energy curves and one-electron properties of several anions at bond lengths close to where these states become unbound. We compare the anions of HCl and pyrrole, which are associated with s-wave scattering, with N2 and H2, which correspond to resonances. For HCl and pyrrole, we observe, on inclusion of diffuse basis functions, a pronounced bending effect in the anionic potential energy curves near the crossing points with their corresponding neutral molecules. Additionally, we observe that the Dyson orbital and second moment of the electron density become extremely large in this region; for HCl, the size of the latter becomes 5 orders of magnitude larger over a range of 5 pm. This behaviour is not observed in H2 or N2. Our work thus shows that bound state electronic-structure methods can distinguish between anions that turn into electronic resonances and those associated with s-wave scattering states.
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Affiliation(s)
- Robin E Moorby
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
- Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, UK
| | | | - Maristella Alessio
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
| | - Thomas-C Jagau
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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Kas M, Loreau J, Liévin J, Vaeck N. Ab initio study of reactive collisions between Rb(2S) or Rb(2P) and OH−(1Σ+). J Chem Phys 2016; 144:204306. [DOI: 10.1063/1.4950784] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Milaim Kas
- Service de Chimie Quantique et Photophysique (CQP), Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Jérôme Loreau
- Service de Chimie Quantique et Photophysique (CQP), Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Jacques Liévin
- Service de Chimie Quantique et Photophysique (CQP), Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Nathalie Vaeck
- Service de Chimie Quantique et Photophysique (CQP), Université libre de Bruxelles (ULB), Brussels, Belgium
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Fabrikant II. Theory of dissociative electron attachment: Biomolecules and clusters. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20158407001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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