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Zdanovskaia MA, Franke PR, Esselman BJ, Billinghurst BE, Zhao J, Stanton JF, Woods RC, McMahon RJ. Vibrationally excited states of 1H- and 2H-1,2,3-triazole isotopologues analyzed by millimeter-wave and high-resolution infrared spectroscopy with approximate state-specific quartic distortion constants. J Chem Phys 2023; 158:044301. [PMID: 36725515 DOI: 10.1063/5.0137340] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
In this work, we present the spectral analysis of 1H- and 2H-1,2,3-triazole vibrationally excited states alongside provisional and practical computational predictions of the excited-state quartic centrifugal distortion constants. The low-energy fundamental vibrational states of 1H-1,2,3-triazole and five of its deuteriated isotopologues ([1-2H]-, [4-2H]-, [5-2H]-, [4,5-2H]-, and [1,4,5-2H]-1H-1,2,3-triazole), as well as those of 2H-1,2,3-triazole and five of its deuteriated isotopologues ([2-2H]-, [4-2H]-, [2,4-2H]-, [4,5-2H]-, and [2,4,5-2H]-2H-1,2,3-triazole), are studied using millimeter-wave spectroscopy in the 130-375 GHz frequency region. The normal and [2-2H]-isotopologues of 2H-1,2,3-triazole are also analyzed using high-resolution infrared spectroscopy, determining the precise energies of three of their low-energy fundamental states. The resulting spectroscopic constants for each of the vibrationally excited states are reported for the first time. Coupled-cluster vibration-rotation interaction constants are compared with each of their experimentally determined values, often showing agreement within 500 kHz. Newly available coupled-cluster predictions of the excited-state quartic centrifugal distortion constants based on fourth-order vibrational perturbation theory are benchmarked using a large number of the 1,2,3-triazole tautomer isotopologues and vibrationally excited states studied.
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Affiliation(s)
- Maria A Zdanovskaia
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Peter R Franke
- Quantum Theory Project, Departments of Physics and Chemistry, University of Florida, Gainesville, Florida 32611, USA
| | - Brian J Esselman
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Brant E Billinghurst
- Canadian Light Source, Inc., University of Saskatchewan, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Jianbao Zhao
- Canadian Light Source, Inc., University of Saskatchewan, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - John F Stanton
- Quantum Theory Project, Departments of Physics and Chemistry, University of Florida, Gainesville, Florida 32611, USA
| | - R Claude Woods
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Robert J McMahon
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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Barone V, Ceselin G, Fusè M, Tasinato N. Accuracy Meets Interpretability for Computational Spectroscopy by Means of Hybrid and Double-Hybrid Functionals. Front Chem 2020; 8:584203. [PMID: 33195078 PMCID: PMC7645164 DOI: 10.3389/fchem.2020.584203] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 08/17/2020] [Indexed: 11/13/2022] Open
Abstract
Accuracy and interpretability are often seen as the devil and holy grail in computational spectroscopy and their reconciliation remains a primary research goal. In the last few decades, density functional theory has revolutionized the situation, paving the way to reliable yet effective models for medium size molecules, which could also be profitably used by non-specialists. In this contribution we will compare the results of some widely used hybrid and double hybrid functionals with the aim of defining the most suitable recipe for all the spectroscopic parameters of interest in rotational and vibrational spectroscopy, going beyond the rigid rotor/harmonic oscillator model. We will show that last-generation hybrid and double hybrid functionals in conjunction with partially augmented double- and triple-zeta basis sets can offer, in the framework of second order vibrational perturbation theory, a general, robust, and user-friendly tool with unprecedented accuracy for medium-size semi-rigid molecules.
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Affiliation(s)
- Vincenzo Barone
- SMART Laboratory, Scuola Normale Superiore di Pisa, Pisa, Italy
| | - Giorgia Ceselin
- SMART Laboratory, Scuola Normale Superiore di Pisa, Pisa, Italy
| | - Marco Fusè
- SMART Laboratory, Scuola Normale Superiore di Pisa, Pisa, Italy
| | - Nicola Tasinato
- SMART Laboratory, Scuola Normale Superiore di Pisa, Pisa, Italy
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Boussessi R, Tasinato N, Pietropolli Charmet A, Stoppa P, Barone V. Sextic centrifugal distortion constants: interplay of density functional and basis set for accurate yet feasible computations. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1734678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
| | | | | | - Paolo Stoppa
- Università Ca’ Foscari Venezia, Dipartimento di Scienze Molecolari e Nanosistemi, Mestre Venezia, Italy
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McKean DC, Craig NC, Law MM. Vibrational Anharmonicity and Harmonic Force Fields for Dichloromethane from Quantum-Chemical Calculations. J Phys Chem A 2008; 112:10006-16. [DOI: 10.1021/jp803881c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Donald C. McKean
- School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, U.K., Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, and Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, U.K
| | - Norman C. Craig
- School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, U.K., Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, and Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, U.K
| | - Mark M. Law
- School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, U.K., Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, and Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, U.K
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McKean DC, Craig NC, Law MM. Scaled Quantum Chemical Force Fields for 1,1-Difluorocyclopropane and the Influence of Vibrational Anharmonicity. J Phys Chem A 2008; 112:6760-71. [DOI: 10.1021/jp800628x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Donald C. McKean
- School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, U.K., Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, and Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, U.K
| | - Norman C. Craig
- School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, U.K., Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, and Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, U.K
| | - Mark M. Law
- School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, U.K., Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, and Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, U.K
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