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Synthesis and crystal structure of N-(1-phenyl-3-methyl-4-benzal-pyrazolone-5)- N′-salicylidene hydrazine

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Abstract

A novel Schiff base compound, N-(1-phenyl-3-methyl-4-benzal-pyrazolone-5)-salicylidene hydrazine (PMBP-SAH), has been synthesized and characterized by X-ray diffraction: monoclinic, space group C2/c with a = 21.796(5) Å, b = 18.370(3) Å, c = 20.843(3) Å, β = 95.440(10)°, V = 8308(3) Å3, and Z = 16. The title compound contains two kinds of tautomers: the red compound is the keto form and the other is the enol form. Changes in color are due to the isomerization of the enol and keto forms by the intramolecular proton transfer.

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Authors and Affiliations

  1. Institute of Applied Chemistry, Xinjiang University, Urumqi, 830046, People's Republic of China

    Lang Liu, Dianzeng Jia, Yongmin Qiao & Yali Ji

  2. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610012, People's Republic of China

    Yali Ji & Kaibei Yu

Authors
  1. Lang Liu
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  2. Dianzeng Jia
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  3. Yongmin Qiao
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  4. Yali Ji
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  5. Kaibei Yu
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Correspondence to Dianzeng Jia.

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Liu, L., Jia, D., Qiao, Y. et al. Synthesis and crystal structure of N-(1-phenyl-3-methyl-4-benzal-pyrazolone-5)- N′-salicylidene hydrazine. Journal of Chemical Crystallography 32, 255–259 (2002). https://doi.org/10.1023/A:1020253107203

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