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. 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

Galal H Elgemeie  1 , Shahinaz H Sayed, Peter G Jones
Affiliations

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

Galal H Elgemeie et al. Acta Crystallogr Sect E Struct Rep Online. .

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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Figures

Fig. 1.
Fig. 1.
Molecular structure of the title compound. Ellipsoids represent 50% probability levels.
Fig. 2.
Fig. 2.
Packing diagram of the title compound projected along the b axis, showing the layer structure side-on.
Fig. 3.
Fig. 3.
Packing diagram of the title compound, viewed perpendicular to (100). Thick dashed bonds represent classical H bonds. Atom names correspond to the asymmetric unit; hydrogen bonds are numbered according to the Table on page Sup-7 (#4, the weaker part of a three-centre interaction, is omitted, as is the intramolecular interaction #5).
Fig. 4.
Fig. 4.
The formation of the title compound
See this image and copyright information in PMC

References

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    1. Elgemeie, G. H. & El-Aziz, H. A. (2002). Synth. Commun. 32, 253–261.
    1. Elgemeie, G. H., El-Ezbawy, S. R. & El-Aziz, H. A. (2001). Synth. Commun. 31, 3453–3451.
    1. Elgemeie, G. H., Elghandour, A. H. & Abd Elaziz, G. W. (2007). Synth. Commun. 37, 2827–2834.
    1. Elgemeie, G. H. & Sood, S. A. (2003). Synth. Commun. 33, 2095–2105.