A one-dimensional ladder-like coordination polymer: poly[[hexa­aqua­bis(μ-5-nitro­benzene-1,3-dicarboxyl­ato-κ(3) O,O′,O′′)(μ-oxalato-κ(4) O,O′:O′′,O′′′)diyttrium(III)] trihydrate]

In the crystal structure of the title one-dimensional coordination polymer, [Y(2)(C(8)H(3)NO(6))(2)(C(2)O(4))(H(2)O)(6)]·3H(2)O, each Y(III) ion is bridged to its neighbours by two 5-nitro­benzene-1,3-dicarboxyl­ate (nbdc) dianions and one oxalate dianion (located on an inversion centre) to form a ladder-like polymeric structure. The two carboxylate groups of nbdc assume different modes of coordination, one is chelating whereas the other is monodentate. Three water mol­ecules coordinate to the Y(III) ion to complete an eight-coordinate distorted dodecahedral geometry. The ladder-like polymers are assembled together by hydrogen bonding and π–π stacking [centrio–centriod distance = 3.819 (9) Å] in the crystal structure.