title: Di-aqua-bis-(nicotinamide-κN (1))bis-(thio-cyanato-κN)nickel(II).
abstract: In the title complex, [Ni(NCS)2(C6H6N2O)2(H2O)2], the Ni(II) ion is located on an inversion center and is coordinated in a distorted octa-hedral environment by two N atoms from two nicotinamide ligands and two water mol-ecules in the equatorial plane, and two N atoms from two thio-cyanate 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 thio-cyanate anions form an R 4 (2)(8) motif. The complex mol-ecules are linked by O-H⋯O, O-H⋯S, and N-H⋯S hydrogen bonds into a three-dimensional supra-molecular structure. Weak π-π inter-actions between the pyridine rings is also found [centroid-centroid distance = 3.8578 (14) Å].
authors.affiliation: Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211 004, India.
authors.forename: Deepanjali
authors.initials: D
authors.lastname: Pandey
authors.affiliation: Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211 004, India.
authors.forename: Shahid S
authors.initials: SS
authors.lastname: Narvi
authors.affiliation: Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211 004, India.
authors.forename: Gopal K
authors.initials: GK
authors.lastname: Mehrotra
authors.affiliation: Department of Chemistry, Howard University, 2400 Sixth Street, N.W. Washington, DC 20059, USA.
authors.forename: Raymond J
authors.initials: RJ
authors.lastname: Butcher