A second polymorph of (Z)-3-amino-4-(2-phenyl-hydrazinyl-idene)-1H-pyrazol-5(4H)-one.
作者信息
Elgazwy Abdel-Sattar S Hamad, Jones Peter G
机构信息
Chemistry Department, Faculty of Science, Ain Shams University, Abbassia 11566, Cairo, Egypt.
Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Postfach 3329, 38023 Braunschweig, Germany.
出版信息
Acta Crystallogr Sect E Struct Rep Online. 2014 Jan 15;70(Pt 2):o141-2. doi: 10.1107/S1600536814000427. eCollection 2014 Feb 1.
The mol-ecule of the title compound, C9H9N5O, 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 intra-molecular N-Hhydrazine⋯O=C hydrogen bond is present. In the crystal, mol-ecules 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 P21/c [Elgemeie et al. (2013 ▶). Acta Cryst. E69, o187], with stepped layers and a significantly lower density.
Zotero 插件