The title complex, [Ni(C6H4NO2)(2) (H2O)(4)], consists of Ni atoms coordina
ted to two trans pyridylcarboxylate ligands, coordinated through the N atom
s, and four water ligands. The Ni atom lies on a centre of symmetry. Extens
ive inter-complex hydrogen bonding occurs between the water ligands and the
carboxylate groups, resulting in a three-dimensional network.