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Nieto Gómez, Carla Isabel

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Nieto Gómez
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Carla Isabel
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2022 - 20232
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Autor: Elguero, José × Fecha de inicio: 2020 ×

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Mostrando 1 - 2 de 2
  • Miniatura
    Publicación
    Pyrazaboles and pyrazolylboranes
    (Elsevier, 2022-12-15) Nieto Gómez, Carla Isabel; Claramunt Vallespí, Rosa María; Alkorta, Ibon; Elguero, José
    The synthesis, reactivity, and properties of pyrazaboles and pyrazolylboranes have been reviewed with special attention to the NMR properties and X-ray structures. 104 X-ray structures are presented and 150 references are cited, which is a significant expansion of previous reviews. It appears that several items are incomplete and others deserve further development indicating than the field of pyrazaboles and of pyrazolylboranes needs new research contributions in particular in the field of coordination chemistry, a field that is clearly underdeveloped.
  • Miniatura
    Publicación
    X‑ray Molecular Structures of 23 N1-4-Nitrophenyl, 2,4- Dinitrophenyl, and 2,4,6-Trinitrophenyl-2-pyrazolines
    (American Chemical Society, 2023-01-03) Torralba, María del Carmen; Nieto Gómez, Carla Isabel; Claramunt Vallespí, Rosa María; Elguero, José
    Herein, we present a complete crystallographic study of three series of N1-aryl substituted-2-pyrazolines, the aryl group being 4-nitrophenyl (series1), 2,4-dinitrophenyl (series2), and 2,4,6-trinitrophenyl (series3). The structural features, bond distances and angles as well as torsions for each single compound will be described and comparatively discussed with data for related heterocycles found in the Cambridge Structural Database (2020.2.0). A deeper look at the data has been achieved to know the influence of the substituents on the molecular structures. In the crystals of compounds with stereogenic centers at positions 4 and 5, the presence of both enantiomers has been encountered in 12 cases out of 14 that include a literature result. Finally, molecular packings in all series have been analyzed reaching the conclusion that they follow several patterns depending on the existence or not, and the type of intermolecular interactions. A general pattern has been observed which implies a certain tendency of the molecules to arrange into chains, whose additional contacts could extend the dimensionality of the network