Date Published: May 01, 2012
Publisher: International Union of Crystallography
Author(s): Yan Bi, Na Wu, Jing Chen.
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-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].
For coordination complexes based on N-involved polydentate ligands, see: Guo et al. (2010 ▶); Ha (2011 ▶); Sun et al. (2011 ▶); Tang et al. (2011 ▶); Yang et al. (2010 ▶). For related structures based on 5-(pyrazin-2-yl)-3-(pyridin-4-yl)-1H-1,2,4-triazole, see: Liu et al. (2009 ▶).