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Ramakrishnan R, Carrington T. Vibrational energy levels of difluorodioxirane computed with variational and perturbative methods from a hybrid force field. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 119:107-112. [PMID: 23290829 DOI: 10.1016/j.saa.2012.11.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 11/06/2012] [Accepted: 11/23/2012] [Indexed: 06/01/2023]
Abstract
We have computed vibrational energy levels of difluorodioxirane (CF2O2). For the potential, a Taylor expansion in normal coordinates is used. The CCSD(T) and MP2 methods and correlation consistent basis sets of quadruple-zeta quality are used to determine the force constants. The vibrational Schrödinger equation was solved using both a variational method and second order perturbation theory. The Watson kinetic energy operator and a discrete variable representation were used with the DEWE (E. Mátyus, G. Czakó, B.T. Sutcliffe and A.G. Császár, J. Chem. Phys. 127 (2007) 084102) computer program to do the variational calculations. For the variational calculations, the average absolute deviation of fundamentals, with respect to experimental values, is less than 3 cm(-1). Perturbative results are almost as good. About 300 vibrational levels were computed. (16)O→(18)O isotopic shifts have also been calculated variationally for the lowest 75 vibrational energy levels and are compared to experimental results.
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Affiliation(s)
- Raghunathan Ramakrishnan
- Theoretische Chemie, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany.
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Mokambe RM, Hicks JM, Kerker D, Jiang W, Theis D, Chen Z, Khait YG, Hoffmann MR. GVVPT2 multireference perturbation theory study of selenium oxides. Mol Phys 2013. [DOI: 10.1080/00268976.2013.809163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Rashel M. Mokambe
- a Department of Chemistry , University of North Dakota , Grand Forks , North Dakota , USA
| | - Jason M. Hicks
- a Department of Chemistry , University of North Dakota , Grand Forks , North Dakota , USA
| | - Dana Kerker
- a Department of Chemistry , University of North Dakota , Grand Forks , North Dakota , USA
| | - Wanyi Jiang
- a Department of Chemistry , University of North Dakota , Grand Forks , North Dakota , USA
| | - Daniel Theis
- a Department of Chemistry , University of North Dakota , Grand Forks , North Dakota , USA
| | - Zhenhua Chen
- a Department of Chemistry , University of North Dakota , Grand Forks , North Dakota , USA
| | - Yuriy G. Khait
- a Department of Chemistry , University of North Dakota , Grand Forks , North Dakota , USA
| | - Mark R. Hoffmann
- a Department of Chemistry , University of North Dakota , Grand Forks , North Dakota , USA
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Azenkeng A, Khait YG, Hoffmann MR. Second-order generalized Van Vleck perturbation theory calculations of potential energy curves for the dissociation of the C–H bond in methane. Mol Phys 2010. [DOI: 10.1080/00268970701651698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Mokambe RM, Khait YG, Hoffmann MR. Ground and Low-Lying Excited Electronic States of [3,3′] Bidiazirinylidene (C2N4). J Phys Chem A 2010; 114:8119-25. [DOI: 10.1021/jp100457e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rashel M. Mokambe
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202-9024
| | - Yuriy G. Khait
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202-9024
| | - Mark R. Hoffmann
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202-9024
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Jiang W, Khait YG, Hoffmann MR. Configuration-Driven Unitary Group Approach for Generalized Van Vleck Variant Multireference Perturbation Theory. J Phys Chem A 2009; 113:4374-80. [DOI: 10.1021/jp811082p] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wanyi Jiang
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202, and Russian Scientific Center “Applied Chemistry”, St. Petersburg 197198, Russia
| | - Yuriy G. Khait
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202, and Russian Scientific Center “Applied Chemistry”, St. Petersburg 197198, Russia
| | - Mark R. Hoffmann
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202, and Russian Scientific Center “Applied Chemistry”, St. Petersburg 197198, Russia
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Ponomarev D, Takhistov V, Slayden S, Liebman J. Thermochemistry of organic, elementorganic and inorganic species. Part XXI: Enthalpies of formation for bi- and triradicals of main group elements’ halogenides. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.05.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Devarajan A, Gaenko AV, Khait YG, Hoffmann MR. Generalized van Vleck Perturbation Theory (GVVPT2) Study of the Excited States of Benzene and the Azabenzenes. J Phys Chem A 2008; 112:2677-82. [DOI: 10.1021/jp077702w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ajitha Devarajan
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202, St. Petersburg State Institute of Technology (Technical University), 26 Moskovskii Ave, St. Petersburg 190013, Russia,and Russian Scientific Center “Applied Chemistry”, 14 Dobrolyubova Ave, St. Petersburg 197198, Russia
| | - Alexander V. Gaenko
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202, St. Petersburg State Institute of Technology (Technical University), 26 Moskovskii Ave, St. Petersburg 190013, Russia,and Russian Scientific Center “Applied Chemistry”, 14 Dobrolyubova Ave, St. Petersburg 197198, Russia
| | - Yuri G. Khait
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202, St. Petersburg State Institute of Technology (Technical University), 26 Moskovskii Ave, St. Petersburg 190013, Russia,and Russian Scientific Center “Applied Chemistry”, 14 Dobrolyubova Ave, St. Petersburg 197198, Russia
| | - Mark R. Hoffmann
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202, St. Petersburg State Institute of Technology (Technical University), 26 Moskovskii Ave, St. Petersburg 190013, Russia,and Russian Scientific Center “Applied Chemistry”, 14 Dobrolyubova Ave, St. Petersburg 197198, Russia
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Pandey RR, Khait YG, Hoffmann MR. Ground and Low-Lying Excited Electronic States of Difluorodiazirine. J Phys Chem A 2004. [DOI: 10.1021/jp0311658] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Rajeev R. Pandey
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202-9024
| | - Yuriy G. Khait
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202-9024
| | - Mark R. Hoffmann
- Chemistry Department, University of North Dakota, Grand Forks, North Dakota 58202-9024
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