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In the title complex, [Zn(C8H3NO6)(H2O)3]n, the two carboxyl­ate groups of the 4-nitro­phthalate dianion ligands have monodentate and 1,3-bridging modes, and Zn atoms are inter­connected by three O atoms from the two carboxyl­ate groups into a zigzag one-dimensional chain along the b-axis direction. The Zn atom shows distorted octa­hedral coordination as it is bonded to three O atoms from carboxyl­ate groups of three 4-nitro­phthalate ligands and to three O atoms of three non-equivalent coordinated water mol­ecules. The one-dimensional chains are aggregated into two-dimensional layers through inter-chain hydrogen bonding. The whole three-dimensional structure is further maintained and stabilized by inter-layer hydrogen bonds.
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