The title complex, [Ni(C6H4NO2)(2) (H2O)(4)], consists of an Ni atom coordi
nated to two trans pyridinecarboxylate ligands, coordinated through the N a
toms, and four water ligands. The Ni atom lies on a site of 2/m symmetry, a
nd the pyridinecarboxylate ligand lies on a mirror plane. Extensive interco
mplex hydrogen bonding occurs between the water ligands and the carboxylate
groups, resulting in a three-dimensional network.