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Crespi AF, Vega D, Sánchez VM, Rodríguez-Castellón E, Lázaro-Martínez JM. Shared Hydrogen Atom Location and Chemical Composition in Picolinic Acid and Pyridoxal Hydrochloride Derivatives Determined by X-ray Crystallography. J Org Chem 2022; 87:13427-13438. [PMID: 36075104 DOI: 10.1021/acs.joc.2c00724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three new single-crystal structures were isolated for picolinic acid (2), the trifluoroacetate salt of picolinic acid (1), and pyridoxal hydrochloride (3). These compounds displayed unconventional crystallographic features that must be considered when structural refinements are carried out. Thus, the generated Fourier differences map obtained with the diffraction data collected at 100 K was crucial to visualize electron densities, which were balanced by either one hydrogen atom or a hydrogen atom with an occupancy factor of 1/2 located between either two carboxylate moieties, two phenolic oxygen atoms, or two pyridinic nitrogen atoms. Moreover, NMR studies were conducted to analyze the bulk chemical composition of single crystals of 2-pyridinecarboxylic acid obtained from the gem-diol/hemiacetal forms and the polymerization products after the treatment of 2-pyridinecarboxaldehyde with TFA:H2O (1) or a diluted Cu(NO3)2 solution (2). The quantitative yield of the pyridoxal hydrochloride crystalline material (3) obtained from a diluted CuCl2 solution was exhaustively characterized by solid-state NMR methods. These methods allowed the resolution of the signals corresponding to the protons of the hydroxyl moiety of the intramolecular hemiacetal group and the phenolic hydrogen. Theoretical calculations using DFT methods were done to complement the atomic location of the hydrogen atoms obtained from the X-ray analysis.
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Affiliation(s)
- Ayelén F Crespi
- Departamento de Ciencias Químicas, Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Instituto de Química y Metabolismo del Fármaco (IQUIMEFA-UBA-CONICET), Ciudad Autónoma de Buenos Aires C1113AAD, Argentina
| | - Daniel Vega
- Universidad Nacional de General San Martín, San Martín, Buenos Aires B1650, Argentina.,Departamento de Física de la Materia Condensada, San Martín, Comisión Nacional de Energía Atómica, Buenos Aires 8250, Argentina
| | - Verónica M Sánchez
- Universidad Nacional de General San Martín, San Martín, Buenos Aires B1650, Argentina.,Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE-UBA-CONICET), Ciudad Autónoma de Buenos Aires C1428EGA, Argentina
| | | | - Juan M Lázaro-Martínez
- Departamento de Ciencias Químicas, Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Instituto de Química y Metabolismo del Fármaco (IQUIMEFA-UBA-CONICET), Ciudad Autónoma de Buenos Aires C1113AAD, Argentina
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Chemical stability of 1-substituted 2-aldimine- and 2-azobenzimidazoles under copper-promoted autoxidation. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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More hydra than Janus – Non-classical coordination modes in complexes of oligopyridine ligands. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.06.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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4
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Mooibroek TJ. Coordinated nitrate anions can be directional π-hole donors in the solid state: a CSD study. CrystEngComm 2017. [DOI: 10.1039/c7ce01266g] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Within the CSD sp2O-atoms cluster closer to the π-hole of NO3−when nitrate is coordinated to a metal.
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Affiliation(s)
- Tiddo J. Mooibroek
- van ‘t Hoff Institute for Molecular Sciences
- Universiteit van Amsterdam
- 1098 XH Amsterdam
- The Netherlands
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Crespi AF, Vega D, Chattah AK, Monti GA, Buldain GY, Lázaro-Martínez JM. gem-Diol and Hemiacetal Forms in Formylpyridine and Vitamin-B6-Related Compounds: Solid-State NMR and Single-Crystal X-ray Diffraction Studies. J Phys Chem A 2016; 120:7778-7785. [DOI: 10.1021/acs.jpca.6b07898] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ayelén Florencia Crespi
- Departamento
de Química Orgánica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956 (C1113AAD), CABA, Argentina
| | - Daniel Vega
- Departamento
de Física de la Materia Condensada, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499 (1650)San Martín, Buenos Aires, Argentina
- Escuela de
Ciencia y Tecnología, Universidad Nacional de General San Martín, Buenos Aires, Argentina
| | - Ana Karina Chattah
- FaMAF-Universidad Nacional de Córdoba & IFEG-CONICET, Medina Allende s/n (X5000HUA), Córdoba, Argentina
| | - Gustavo Alberto Monti
- FaMAF-Universidad Nacional de Córdoba & IFEG-CONICET, Medina Allende s/n (X5000HUA), Córdoba, Argentina
| | - Graciela Yolanda Buldain
- Departamento
de Química Orgánica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956 (C1113AAD), CABA, Argentina
- CONICET, Godoy Cruz 2290 (C1425FQB), CABA, Argentina
| | - Juan Manuel Lázaro-Martínez
- Departamento
de Química Orgánica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956 (C1113AAD), CABA, Argentina
- IQUIFIB-CONICET, Junín 956 (C1113AAD), CABA, Argentina
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Kisel KS, Linti G, Starova GL, Sizov VV, Melnikov AS, Pushkarev AP, Bochkarev MN, Grachova EV, Tunik SP. Syntheses, Structures, and Photophysical Properties of Eu and Lu Diketonates with a Neutral Polydentate Imidazolylmethanamine Ligand. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201403186] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kristina S. Kisel
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russia, http://tmc‐lab.chem.spbu.ru/
| | - Gerald Linti
- Anorganisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, 69120 Heidelberg, Germany
| | - Galina L. Starova
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russia, http://tmc‐lab.chem.spbu.ru/
| | - Vladimir V. Sizov
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russia, http://tmc‐lab.chem.spbu.ru/
| | - Alexei S. Melnikov
- St. Petersburg State Polytechnical University, 195251 St. Petersburg, Russia
- Physical Department, St. Petersburg State University, 198504 St. Petersburg, Russia
| | - Anatoly P. Pushkarev
- Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
| | - Mikhail N. Bochkarev
- Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
- Nizhny Novgorod State University, 603950 Nizhny Novgorod, Russia
| | - Elena V. Grachova
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russia, http://tmc‐lab.chem.spbu.ru/
| | - Sergey P. Tunik
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russia, http://tmc‐lab.chem.spbu.ru/
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Aldehyde coordination in template reactions: Crystal structure of a possible reaction intermediate. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.10.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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