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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Crystal structure of (E)-4-hy­droxy-6-methyl-3-{1-[2-(4-nitro­phen­yl)hydrazinyl­idene]eth­yl}-2H-pyran-2-one
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Crystal structure of (E)-4-hy­droxy-6-methyl-3-{1-[2-(4-nitro­phen­yl)hydrazinyl­idene]eth­yl}-2H-pyran-2-one

机译:(E)-4-羟基-6-甲基-3- {1- [2-(4-硝基苯基)肼基]乙基} -2H-吡喃-2-酮的晶体结构

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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).
机译:标题化合物C14H13N3O5(HMNP)是通过将对硝基苯肼与脱氢乙酸(DHA)在乙醇中以1:1的摩尔比简单缩合而合成的。 HMNP的特征是使用FT-IR,1H和13C NMR,UV-Vis光谱和单晶X射线衍射技术。晶体堆积揭示了NH基团与二氢吡喃酮部分的羰基O原子之间的强氢键,沿着[101]形成链。通过热重分析证实了合成化合物的热稳定性,发现该化合物在513 K范围内稳定,UV-Vis光谱显示在λmax394 nm处存在一个强谱带。 1 H NMR和单晶X射线分析证实了配体的烯醇形式的存在和对酮形式的支配性。所研究的晶体为非面体孪晶,孪晶组分的精炼比例为0.3720(19):0.6280(19)。

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