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Acta Crystallogr Sect E Struct Rep Online. 2013 Feb 1;69(Pt 2):o187. doi: 10.1107/S1600536812050854. Epub 2013 Jan 4.

(E)-3-Amino-4-(2-phenyl-hydrazinyl-idene)-1H-pyrazol-5(4H)-one.

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  • 1Chemistry Department, Faculty of Science, Helwan University, Cairo, Egypt.

Erratum in

  • Acta Crystallogr Sect E Struct Rep Online. 2013 Dec 21;70(Pt 1):e1.

Abstract

The mol-ecule of the title compound, C(9)H(9)N(5)O, is essentially planar (r.m.s. deviation of all atoms = 0.02 Å) except for the NH(2) H atoms. An intra-molecular hydrazinyl-idene-carbonyl N-H⋯O=C hydrogen bond is present. In the crystal, mol-ecules are connected via N-H⋯N/O hydrogen bonds, forming thick layers parallel to (100).

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