Crystal structure of a flexible self-assembled two-dimensional square network complex [Cu2(C3H2O4)2(H 2O)2(4,4′-bpy)]·H2O

The structure of a self-assembled two-dimensional square network complex, [Cu 2 (C 3 H 2 O 4 ) 2 (H 2 O) 2 (4,4′-bpy)]·H 2 O, comprising both flexible and rigid ligands and having a large inner cavity of 15.776(3) × 15.786(2) Å, is reported.