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A 13C chemical shifts study of iodopyrazoles: experimental results and relativistic and non-relativistic calculations. Struct Chem 2021. [DOI: 10.1007/s11224-021-01755-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Sánchez‐Andrada P, Marín‐Luna M, Alkorta I, Elguero J, Percho G, Santa María D, Claramunt RM. Conformational analysis of 2,5‐diaryl‐4‐methyl‐2,
4‐dihydro‐3
H
‐1,2,4‐triazol‐3‐ones: Multinuclear
NMR
and
DFT
calculations. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pilar Sánchez‐Andrada
- Departamento de Química Orgánica, Facultad de Química Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Murcia Spain
| | - Marta Marín‐Luna
- Departamento de Química Orgánica, Facultad de Química Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Murcia Spain
| | | | | | - Gema Percho
- Departamento de Química Orgánica y Bio‐Orgánica, Facultad de Ciencias UNED Madrid Spain
| | - Dolores Santa María
- Departamento de Química Orgánica y Bio‐Orgánica, Facultad de Ciencias UNED Madrid Spain
| | - Rosa M. Claramunt
- Departamento de Química Orgánica y Bio‐Orgánica, Facultad de Ciencias UNED Madrid Spain
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Marín-Luna M, Sánchez-Andrada P, Alkorta I, Elguero J, Torralba MC, Delgado-Martínez P, Santa María D, Claramunt RM. A structural analysis of 2,5-diaryl-4H-2,4-dihydro-3H-1,2,4-triazol-3-ones: NMR in the solid state, X-ray crystallography, and GIPAW calculations. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:423-438. [PMID: 33464666 DOI: 10.1002/mrc.5107] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/09/2020] [Accepted: 10/06/2020] [Indexed: 06/12/2023]
Abstract
The 1 H, 13 C, 15 N, and 19 F nuclear magnetic resonance (NMR) spectra of 11 2,5-diaryl-2,4-dihydro-3H-1,2,4-triazol-3-ones have been acquired in DMSO-d6 solution and the 13 C, 15 N, and 19 F NMR spectra have also been acquired in the solid state (solid-state nuclear magnetic resonance [SSNMR] and magic angle spinning [MAS]). The X-ray structures of Compounds 3, 5, and 6 have been determined by X-ray diffraction. Theoretical calculations at the gauge-independent atomic orbital (GIAO)/B3LYP/6-311++G(d,p) level have provided a set of 321 chemical shifts that were compared with 310 experimental values in DMSO-d6 . To obtain good agreements, some effects need to be included. The SSNMR chemical shifts have been compared with gauge-including projector-augmented wave (GIPAW) calculations and with the heavy atom-light atom (HALA) effects.
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Affiliation(s)
- Marta Marín-Luna
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Regional Campus of International Excellence "Campus Mare Nostrum", Murcia, Spain
| | - Pilar Sánchez-Andrada
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Regional Campus of International Excellence "Campus Mare Nostrum", Murcia, Spain
| | - Ibon Alkorta
- Instituto de Química Médica, CSIC, Madrid, Spain
| | - José Elguero
- Instituto de Química Médica, CSIC, Madrid, Spain
| | - M Carmen Torralba
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, UCM, Madrid, Spain
| | - Patricia Delgado-Martínez
- Unidad de Difracción de Rayos X - CAI técnicas físicas y químicas, Facultad de Ciencias Químicas, UCM, Madrid, Spain
| | - Dolores Santa María
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Madrid, Spain
| | - Rosa M Claramunt
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Madrid, Spain
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Fujisawa K, Okano M, Martín-Pastor M, López-Sánchez R, Elguero J, Alkorta I. Multinuclear magnetic resonance studies of five silver(I) trinuclear pyrazolate complexes. Struct Chem 2020. [DOI: 10.1007/s11224-020-01661-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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Marín-Luna M, Claramunt RM, López C, Pérez-Torralba M, Sanz D, Reviriego F, Alkorta I, Elguero J. A GIPAW versus GIAO-ZORA-SO study of 13C and 15N CPMAS NMR chemical shifts of aromatic and heterocyclic bromo derivatives. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2020; 108:101676. [PMID: 32640403 DOI: 10.1016/j.ssnmr.2020.101676] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/04/2020] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
Theoretical simulation of NMR parameters in compounds bearing heavy atoms generally requires the application of relativistic corrections. We report herein the theoretical characterization of 13C and 15N CPMAS NMR of known bromo-derivative crystals by using both the GIPAW and the combined GIAO-ZORA-SO approximation methods. Several statistical analyses were performed to compare both approaches, with non-relativistic GIPAW method being more useful to predict the 13C and 15N chemical shifts. The problem of applying GIPAW to crystal structures showing static or dynamic crystalline disorder of the special class resulting in half-protons will be discussed in detail.
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Affiliation(s)
- Marta Marín-Luna
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Regional Campus of International Excellence "Campus Mare Nostrum", E-30100, Murcia, Spain.
| | - Rosa M Claramunt
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Paseo Senda del Rey, 9, E-28040, Madrid, Spain
| | - Concepción López
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Paseo Senda del Rey, 9, E-28040, Madrid, Spain
| | - Marta Pérez-Torralba
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Paseo Senda del Rey, 9, E-28040, Madrid, Spain
| | - Dionisia Sanz
- Departamento de Química Orgánica y Bio-Orgánica, Facultad de Ciencias, UNED, Paseo Senda del Rey, 9, E-28040, Madrid, Spain
| | - Felipe Reviriego
- Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva, 3, E-28006, Madrid, Spain
| | - Ibon Alkorta
- Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006, Madrid, Spain
| | - José Elguero
- Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006, Madrid, Spain
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