Diaqua­bis­[5-(pyrazin-2-yl-κN¹)-3-(pyridin-4-yl)-1H-1,2,4-triazol-1-ido-κN¹]cobalt(II) methanol disolvate

The Co^II 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-κN)-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). π–π 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].

4-Meth­oxy-N′-(3-nitro­benzyl­idene)benzohydrazide

In the title compound, C₁₅H₁₃N₃O₄, the dihedral angle between the benzene rings is 3.1 (3)°. The mol­ecule displays an E conformation about the C=N bond. In the crystal, mol­ecules are linked via N—H...O hydrogen bonds, generating chains that propagate along the b-axis direction. There is also a C—H...O inter­action present.