Diaquabis(nicotinamide-κN 1)bis(thiocyanato-κN)nickel(II)

In the title complex, [Ni(NCS)2(C6H6N2O)2(H2O)2], the NiII ion is located on an inversion center and is coordinated in a distorted octahedral environment by two N atoms from two nicotinamide ligands and two water molecules in the equatorial plane, and two N atoms from two thiocyanate anions in the axial positions, all acting as monodentate ligands. In the crystal, weak N—H⋯S hydrogen bonds between the amino groups and the thiocyanate anions form an R 4 2(8) motif. The complex molecules are linked by O—H⋯O, O—H⋯S, and N—H⋯S hydrogen bonds into a three-dimensional supramolecular structure. Weak π–π interactions between the pyridine rings is also found [centroid–centroid distance = 3.8578 (14) Å].