4,7-Phenanthrolinium perchlorate-5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one-water (1/1/2) Caballero Hernández, Ana Belén Quirós Olozábal, Miguel Salas Peregrín, Juan Manuel Perchlorate Crystal The asymmetric unit of the title compound, C12H9N2+·ClO4-·C6H6N4O·2H2O, contains a monoprotonated 4,7-phenanthrolinium (47phen) cation, a perchlorate anion balancing its charge, a neutral molecule of 5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one (HmtpO) and two interstitial water molecules. In the crystal structure, the acidic H atoms of 47phenH+ and HmtpO form strong hydrogen bonds with the water molecules, which in turn act as hydrogen-bond donors, forming links between them and towards the carbonyl O atom of HmtpO, the non-protonated N atom of 47phen+ and one of the O atoms of the anion. 2014-09-24T09:24:09Z 2014-09-24T09:24:09Z 2010 info:eu-repo/semantics/article Caballero, A.B.; Quirós, M.; Salas, J.M. 4,7-Phenanthrolinium perchlorate-5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one-water (1/1/2). Acta Crystallographica Seciton E - Structure Reports Online, 66: O459-O460 (2010). [http://hdl.handle.net/10481/33165] 1600-5368 http://hdl.handle.net/10481/33165 10.1107/S1600536810002564 eng info:eu-repo/semantics/openAccess International Union of Crystallography