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Makulski W. Absolute 13C Nuclear Magnetic Shielding of Simple Isolated Molecules from Gas Phase Measurements. Phys Chem Chem Phys 2022; 24:8950-8961. [DOI: 10.1039/d2cp00231k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The new experimental value of 13C absolute shielding constant in an isolated 13CO molecule was evaluated from the 13C and 3He gas phase NMR measurements performed for 3He/13CO mixtures. The...
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Rusakov YY, Rusakova IL. An efficient method for generating property-energy consistent basis sets. New pecJ- n ( n = 1, 2) basis sets for high-quality calculations of indirect nuclear spin-spin coupling constants involving 1H, 13C, 15N, and 19F nuclei. Phys Chem Chem Phys 2021; 23:14925-14939. [PMID: 34223856 DOI: 10.1039/d1cp01984h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This paper presents a new method of generating property-energy consistent (PEC) basis sets that can be applied to any arbitrary molecular property. The PEC method generates a basis set that is optimized for the molecular property under interest, providing the least possible total molecular energy. The main algorithm of the PEC approach involves Monte Carlo simulations to generate random exponents in the predetermined range. In this work, the PEC method is introduced in the example of generation of new pecJ-n (n = 1, 2) basis sets suited for high-quality correlated calculations of indirect nuclear spin-spin coupling constants involving the most popular NMR-active nuclei: 1H, 13C, 15N, and 19F.
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Affiliation(s)
- Yuriy Yu Rusakov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky St. 1, 664033 Irkutsk, Russian Federation.
| | - Irina L Rusakova
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky St. 1, 664033 Irkutsk, Russian Federation.
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Kupka T, Mnich A, Broda MA. Performance of revised STO(1M)-3G basis set for prediction of 5-fluorocytosine chemical shifts. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:489-498. [PMID: 31013546 DOI: 10.1002/mrc.4879] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/14/2019] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
Nuclear shieldings and chemical shifts of 5-fluorocytosine (5FC) were predicted in the gas phase and DMSO solution modeled by polarizable continuum model using B3LYP density functional and revised STO(1M)-3G basis set. For comparison, eight arbitrary selected basis sets including STO-3G and medium-size Pople-type and larger dedicated Jensen-type ones were applied. The former basis sets were significantly smaller, but the calculated structural parameters, harmonic vibrational frequencies, were very accurate and close to those obtained with larger, polarization-consistent ones. The predicted 13 C and 1 H chemical shieldings of 5FC and cytosine, selected as parent molecule, were acceptable (root mean square for 13 C chemical shifts in DMSO of about 5 ppm and less) though less accurate than those calculated with large basis sets, dedicated for prediction of nuclear magnetic resonance parameters.
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Affiliation(s)
- Teobald Kupka
- Faculty of Chemistry, University of Opole, 48, Oleska Street, 46-052, Opole, Poland
| | - Adrianna Mnich
- Faculty of Chemistry, University of Opole, 48, Oleska Street, 46-052, Opole, Poland
| | - Małgorzata A Broda
- Faculty of Chemistry, University of Opole, 48, Oleska Street, 46-052, Opole, Poland
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Kupka T, Stachów M, Chełmecka E, Pasterny K, Stobińska M, Stobiński L, Kaminský J. Efficient Modeling of NMR Parameters in Carbon Nanosystems. J Chem Theory Comput 2013; 9:4275-86. [DOI: 10.1021/ct4002812] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Teobald Kupka
- University of Opole, Faculty of Chemistry,
48, Oleska Street, 45-052 Opole, Poland
| | - Michał Stachów
- University of Opole, Faculty of Chemistry,
48, Oleska Street, 45-052 Opole, Poland
| | - Elżbieta Chełmecka
- Division of Statistics, Department
of Instrumental Analysis, Medical University of Silesia, 30 Ostrogórska Street, 41-200 Sosnowiec, Poland
| | - Karol Pasterny
- A. Chełkowski Institute of
Physics, University of Silesia, 4 Uniwersytecka
Street, 40-007 Katowice, Poland
| | - Magdalena Stobińska
- Institute of Theoretical Physics and Astrophysics, University of Gdańsk, 57 Wita Stwosza Street, 80-952 Gdańsk,
Poland
- Institute of Physics, Polish Academy of Sciences, 32/46, al. Lotników,
02-668 Warsaw, Poland
| | - Leszek Stobiński
- Institute
of Physical Chemistry, Polish Academy of Sciences, 44/52 Kasprzaka Street, 01-224 Warsaw, Poland
| | - Jakub Kaminský
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo Nam. 2., 166
10 Prague, Czech Republic
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Kupka T, Stachów M, Nieradka M, Kaminsky J, Pluta T. Convergence of Nuclear Magnetic Shieldings in the Kohn-Sham Limit for Several Small Molecules. J Chem Theory Comput 2010; 6:1580-9. [PMID: 26615692 DOI: 10.1021/ct100109j] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Convergence patterns and limiting values of isotropic nuclear magnetic shieldings were studied for several small molecules (N2, CO, CO2, NH3, CH4, C2H2, C2H4, C2H6, and C6H6) in the Kohn-Sham limit. Individual results of calculations using dedicated families of Jensen's basis sets (pcS-n and pcJ-n) were fitted toward the complete basis set limit (CBS) using a simple two-parameter formula. Several density functionals were used; calculated vibrational corrections (ZPV) applied; and, for comparison purposes, similar calculations performed using RHF, MP2, SOPPA, SOPPA(CCSD), and CCSD(T) methods and additionally, the aug-cc-pVTZ-J basis set. Finally, the CBS estimated results were critically compared with earlier reported literature data and experimental results. Among 42 studied DFT methods, the KTn and "pure" functionals produced the most accurate heavy atom isotropic nuclear shieldings.
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Affiliation(s)
- Teobald Kupka
- University of Opole, Faculty of Chemistry, Poland, Department of Molecular Spectroscopy, Institute of Organic Chemistry and Biochemistry, Prague, Czech Republic, and University of Silesia, Institute of Chemistry, Katowice, Poland
| | - Michał Stachów
- University of Opole, Faculty of Chemistry, Poland, Department of Molecular Spectroscopy, Institute of Organic Chemistry and Biochemistry, Prague, Czech Republic, and University of Silesia, Institute of Chemistry, Katowice, Poland
| | - Marzena Nieradka
- University of Opole, Faculty of Chemistry, Poland, Department of Molecular Spectroscopy, Institute of Organic Chemistry and Biochemistry, Prague, Czech Republic, and University of Silesia, Institute of Chemistry, Katowice, Poland
| | - Jakub Kaminsky
- University of Opole, Faculty of Chemistry, Poland, Department of Molecular Spectroscopy, Institute of Organic Chemistry and Biochemistry, Prague, Czech Republic, and University of Silesia, Institute of Chemistry, Katowice, Poland
| | - Tadeusz Pluta
- University of Opole, Faculty of Chemistry, Poland, Department of Molecular Spectroscopy, Institute of Organic Chemistry and Biochemistry, Prague, Czech Republic, and University of Silesia, Institute of Chemistry, Katowice, Poland
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Lutnæs OB, Helgaker T, Jaszuński M. Density-functional calculations of the nuclear magnetic shielding and indirect nuclear spin–spin coupling constants of three isomers of C20. Mol Phys 2008. [DOI: 10.1080/00268970802467994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ola B. Lutnæs
- a Centre for Theoretical and Computational Chemistry, Department of Chemistry , University of Oslo , Oslo, Norway
| | - Trygve Helgaker
- a Centre for Theoretical and Computational Chemistry, Department of Chemistry , University of Oslo , Oslo, Norway
| | - Michał Jaszuński
- b Institute of Organic Chemistry, Polish Academy of Sciences , Warsaw, Poland
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Jackowski K, Kubiszewski M, Wilczek M. 13C and 1H nuclear magnetic shielding and spin–spin coupling constants of 13C-enriched bromomethane in the gas phase. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2007.04.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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