trans-Diaquabis(nicotinamide-kappa N)bis(salicylato-kappa O)cobalt(II)

Abstract

The title compound, [Co(C<inf>7</inf>H<inf>5</inf>O<inf>3</inf>) <inf>2</inf>(C<inf>6</inf>H<inf>6</inf>N<inf>2</inf>O)<inf>2</inf>(H <inf>2</inf>O)<inf>2</inf>], forms a three-dimensional hydrogen-bonded supra-molecular structure. The CoII ion is in an octa-hedral coordination environment comprising two pyridyl N atoms, two carboxyl-ate O atoms and two O atoms from water mol-ecules. Inter-molecular N - H⋯O and O - H⋯O hydrogen bonds produce R <inf>2</inf>2(8), R <inf>2</inf>2(12) and R <inf>2</inf>2(14) rings, which lead to two-dimensional chains. An extensive three-dimensional supra-molecular network of C - H⋯O, N - H⋯O and O - H⋯O hydrogen bonds and C - H⋯π inter-actions is responsible for crystal structure stabilization. This study is an example of the construction of a supra-molecular assembly based on hydrogen bonds in mixed-ligand metal complexes. © 2008 International Union of Crystallography.