(-4,4′-Bipyridine-2 N:N′)bis-[triaqua-(4,4′- bipyridine-N)(3-nitro-phthalato-O 2)cobalt(II)]

Abstract

The title binuclear complex, [Co2 (C8H 3NO6)2(C10H8N 2)3 (H2O)6], has been synthesized hydro-thermally from 3-nitro-phthalic acid (H2NPA), Co(NO 3)2·6H2O and 4,4′-bipyridine (4,4′-bipy). The mol-ecule of the complex occupies a special position on an inversion centre. The CoII atom has a slightly distorted octa-hedral environment formed by two N atoms from two 4,4′-bipy ligands, one carboxyl-ate O atom from NPA, and three O atoms of water mol-ecules. An extensive O - H⋯O and N - H⋯O hydrogen-bonding system links mol-ecules of the complex into a three-dimensional network. © 2009 Guo et al.