Redetermination of trans-Diaquabis(Picolinato-Kappa N-2,O)Cobalt(II) Dihydrate

Abstract

The crystal structure of the title compound, [Co(C<inf>6</inf>H <inf>4</inf>NO<inf>2</inf>)2-(H<inf>2</inf>O)<inf>2</inf>]·2H <inf>2</inf>O, has been reinvestigated with improved precision [previous reports: Chang et al. (1972). J. Coord. Chem. 2, 31-34; Lumme et al. (1969). Suom. Kemistil, B, 42, 270]. In the title compound, the Co atom is located on an inversion center and its coordination can be described as slightly distorted octahedral, equatorially trans-coordinated by two N and O atoms of two picolinate ligands and axially coordinated by two O atoms of the water molecules. Intermolecular O-H⋯O and C-H⋯O hydrogen-bonding interactions result in the formation of an intricate three-dimensional network. © 2006 International Union of Crystallography All rights reserved.