A tetracarboxylatobenzene-bridged binuclear copper(II) complex

The tetracarboxylatobenzene tetraanion in mu-(1,2,4,5-benzenetetracarboxylato-O-1:O-4)bis[aqua(4-azaheptane- 1,7-diamine-N,N',N '')copper(II)] octahydrate, [{Cu-(C6H17N3)(H2O)}(2)(mu-C10H2O8)].8H(2)O, bridges two N,N',N ''-chelated aquacopper entities in a monodentate manner to give rise to square-pyramidal coordination at the metal centres. Hydrogen bonding involving the three N atoms, the four carboxyl O atoms and the five water molecules gives rise to a three-dimensional network structure.