Elgazwy Abdel-Sattar S Hamad, Jones Peter G
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.
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.
标题化合物C₉H₉N₅O的分子近似平面结构（所有非H原子的均方根偏差为0.08 Å）。胺取代基在N原子处呈棱锥形。存在分子内N-H…肼基…O=C氢键。在晶体中，分子通过N-H…N和N-H…O氢键相连，形成平行于(010)的无限层。该多晶型为三斜晶系，空间群P-1，而先前报道的晶型为单斜晶系，空间群P21/c [埃尔格迈伊等人（2013年▶）。《晶体学报》E69，o187]，具有阶梯状层且密度显著较低。
