TY - JOUR A1 - Yathirajan, Hemmige S. A1 - Narayana, Badiadka A1 - Swamy, M. T. A1 - Sarojini, Balladka Kunhanna A1 - Bolte, Michael T1 - Phthalazin-1(2H)-one–picric acid (1/1) T2 - Acta crystallographica / Section E, Structure reports online N2 - The geometric parameters of the title compound, C8H6N2O·C6H3N3O7, are in the usual ranges. The three nitro groups are almost coplanar with the aromatic picrate ring [dihedral angles 10.2 (2)°, 7.62 (16) and 8.08 (17)°]. The molecular conformation of the picric acid is stabilized by an intramolecular O-H...O hydrogen bond. The phthalazin-1(2H)-one molecules are connected via N-H...O hydrogen bonds, forming centrosymmetric dimers. Key indicators: single-crystal X-ray study; T = 173 K; mean σ(C–C) = 0.002 Å; R factor = 0.034; wR factor = 0.091; data-to-parameter ratio = 11.1. Y1 - 2007 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/6904 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-69790 N1 - This is an open-access article distributed under the terms of the Creative Commons Attribution Licence http://creativecommons.org/licenses/by/2.0/uk/legalcode, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited. VL - 64 IS - o119 ER -