Learning by Experimentation

R factor = 0.050; wR factor = 0.121; data-to-parameter ratio = 12.0. In the title structure, [Co(C12H10N6)2(H2O)2](ClO4)2, the Co II atom lies on an inversion centre and is coordinated in a slightly distorted octahedral geometry by four N atoms from two 4-amino-3,5-bis(pyridin-2-yl)-4H-1,2,4-triazole (adpt) ligands in equatorial positions and two O atoms from two water molecules in axial positions. An intramolecular N— H N interaction stabilizes the molecular conformation. Intermolecular N—H O and O—H O interactions invol-ving the perchlorate counter-anions extend the monomeric compound into a two-dimensional network parallel to the bc plane. Related literature For the synthesis of the adpt ligand, see: Geldard & Lions (1965). For background to the coordination chemistry of the adpt ligand, see: Meng et al. (2009). For intramolecular hydrogen bonds in the adpt ligand, see: Kitchen et al. (2008). For other Co(II) coordination compounds with the sam