Experimental

R factor = 0.040; wR factor = 0.104; data-to-parameter ratio = 12.2. The CoII ion in the title mononuclear compound, [Co(C11H7N6)2(H2O)2]2CH3OH, is located on an inversion center and is six-coordinated in a distorted octahedral geometry defined by four N atoms from two deprotonated 5-(pyrazin-2-yl-N)-3-(pyridin-4-yl)-1H-1,2,4-triazol-1-ide (ppt) ligands and two water molecules. In the crystal, the complex molecules and lattice methanol molecules are linked via O—H N and O—H O hydrogen bonds, generating a two-dimensional supramolecular network parallel to (001). – interactions between the triazole and pyrazine rings and between the pyridine rings are present [centroid–centroid distances = 3.686 (3) and 3.929 (4) Å, respectively]. Related literature For coordination complexes based on N-involved polydentat