Crystal structures of 3‐methyl‐2(1H)‐quinoxalinone and three substituted derivatives

Autor: MONDIEIG, Denise, NÉGRIER, Philippe, MASSIP, Stéphane, LEGER, Jean-Michel, JARMOUMI, Chakir, LAKHRISSI, Brahim
Přispěvatelé: Laboratoire Ondes et Matière d'Aquitaine (LOMA), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Pharmacochimie, Université Bordeaux Segalen - Bordeaux 2-EA4138, Laboratoire de Chimie d'Agroressources et Génie des Procédés, Université Ibn Tofaïl (UIT)
Jazyk: angličtina
Rok vydání: 2011
Předmět:
Zdroj: Journal of Physical Organic Chemistry
Journal of Physical Organic Chemistry, Wiley, 2011, 24 (12), pp.1193-1200. ⟨10.1002/poc.1846⟩
ISSN: 0894-3230
1099-1395
DOI: 10.1002/poc.1846⟩
Popis: International audience; 3-Methyl-2(1H)-quinoxalinone and three derivatives (3,7-dimethyl-2(1H)-quinoxalinone, 3-methyl-6,7-dichloro-2(1H)-quinoxalinone and 3-methyl-7-nitro-2(1H)-quinoxalinone) have been synthesised and analysed by 1H NMR and IR spectral spectroscopies. The crystal structures have been determined at room temperature from X-ray single crystal diffraction data for three of them and from powder diffraction data for the nitro derivative. 3-Methyl-2(1H)-quinoxalinone crystallises in the P21/c monoclinic system, 3,7-dimethyl-2(1H)-quinoxalinone in the Pbca orthorhombic system and the two others compounds in the Pequation image triclinic system. For the nitro derivative, C-H..N short contacts are established between the carbon of the methyl and the double bounded nitrogen of the ring. For the three other compounds N-H..O hydrogen bonds involve the atoms of the heterocyclic ring.
Databáze: OpenAIRE
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