A second polymorph of (Z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1H-pyrazol-5(4H)-one

The mol­ecule of the title compound, C(9)H(9)N(5)O, is approximately planar (the r.m.s. deviation of all non-H atoms is 0.08 Å). The amine substituent is pyramidal at the N atom. An intra­molecular N—H(hydrazine)⋯O=C hydrogen bond is present. In the crystal, mol­ecules are connected via N—H⋯N and N—...

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Autores principales: Elgazwy, Abdel-Sattar S. Hamad, Jones, Peter G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2014
Materias:
Organic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3998306/
https://www.ncbi.nlm.nih.gov/pubmed/24764867
http://dx.doi.org/10.1107/S1600536814000427
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author Elgazwy, Abdel-Sattar S. Hamad
Jones, Peter G.
author_facet Elgazwy, Abdel-Sattar S. Hamad
Jones, Peter G.
author_sort Elgazwy, Abdel-Sattar S. Hamad
collection PubMed
description The mol­ecule of the title compound, C(9)H(9)N(5)O, is approximately planar (the r.m.s. deviation of all non-H atoms is 0.08 Å). The amine substituent is pyramidal at the N atom. An intra­molecular N—H(hydrazine)⋯O=C hydrogen bond is present. In the crystal, mol­ecules are connected via N—H⋯N and N—H⋯O hydrogen bonds, forming infinite layers parallel to (010). This polymorph is triclinic, space group P-1, whereas the previously reported form was monoclinic, space group P2(1)/c [Elgemeie et al. (2013 ▶). Acta Cryst. E69, o187], with stepped layers and a significantly lower density.
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spelling pubmed-39983062014-04-24 A second polymorph of (Z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1H-pyrazol-5(4H)-one Elgazwy, Abdel-Sattar S. Hamad Jones, Peter G. Acta Crystallogr Sect E Struct Rep Online Organic Papers The mol­ecule of the title compound, C(9)H(9)N(5)O, is approximately planar (the r.m.s. deviation of all non-H atoms is 0.08 Å). The amine substituent is pyramidal at the N atom. An intra­molecular N—H(hydrazine)⋯O=C hydrogen bond is present. In the crystal, mol­ecules are connected via N—H⋯N and N—H⋯O hydrogen bonds, forming infinite layers parallel to (010). This polymorph is triclinic, space group P-1, whereas the previously reported form was monoclinic, space group P2(1)/c [Elgemeie et al. (2013 ▶). Acta Cryst. E69, o187], with stepped layers and a significantly lower density. International Union of Crystallography 2014-01-15 /pmc/articles/PMC3998306/ /pubmed/24764867 http://dx.doi.org/10.1107/S1600536814000427 Text en © Elgazwy and Jones 2014 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Organic Papers
Elgazwy, Abdel-Sattar S. Hamad
Jones, Peter G.
A second polymorph of (Z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1H-pyrazol-5(4H)-one
title A second polymorph of (Z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1H-pyrazol-5(4H)-one
title_full A second polymorph of (Z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1H-pyrazol-5(4H)-one
title_fullStr A second polymorph of (Z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1H-pyrazol-5(4H)-one
title_full_unstemmed A second polymorph of (Z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1H-pyrazol-5(4H)-one
title_short A second polymorph of (Z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1H-pyrazol-5(4H)-one
title_sort second polymorph of (z)-3-amino-4-(2-phenyl­hydrazinyl­idene)-1h-pyrazol-5(4h)-one
topic Organic Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3998306/
https://www.ncbi.nlm.nih.gov/pubmed/24764867
http://dx.doi.org/10.1107/S1600536814000427
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