Crystal structure of (E)-4-hy­droxy-6-methyl-3-{1-[2-(4-nitro­phen­yl)hydrazinyl­idene]eth­yl}-2H-pyran-2-one

Acta Crystallographica Section E: Crystallographic Communications

Kataria, R.¹  Kumar, G.¹  Negi, P.¹  Kirandeep¹  Husain, A.² 

[1] Department of Chemistry, Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India;Department of Chemistry, DAV University Jalandhar, Jalandhar 144 001, Punjab, India

关键词: CRYSTAL STRUCTURE;    HMNP;    DEHYDROACETIC ACID;    HYDROGEN BONDING;    THERMAL STABILITY;   

DOI  :  10.1107/S2056989017000639

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The title compound, C14H13N3O5 (HMNP), was synthesized by the simple condensation of p-nitro­phenyl­hydrazine with de­hydro­acetic acid (DHA) in a 1:1 molar ratio in ethanol. HMNP has been characterized by using FT–IR, 1H and 13C NMR and UV–Vis spectroscopic and single-crystal X-ray diffraction techniques. The crystal packing reveals strong hydrogen bonds between the NH group and the carbonyl O atom of di­hydro­pyran­one moiety, forming chains along [101]. The thermal stability of the synthesized compound was confirmed by thermogravimetric analysis and it was found to be stable up to 513 K. The UV–Vis spectrum shows the presence of a strong band at λmax 394 nm. 1H NMR and single-crystal X-ray analyses confirmed the presence of the enol form of the ligand and dominance over the keto form. The crystal studied was a non-merohedral twin with the refined ratio of the twin components being 0.3720 (19):0.6280 (19).

【 授权许可】

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