catena-Poly[[diaqua­(isonicotinato-κ2 O, O′)­dysprosium(III)]-di-μ-isonicotinato-κ4 O: O′].

The title dysprosium coordination polymer [Dy(IN)3(H2O)2] n, where IN− is the isonicotinate anion C6H4NO2−, has been hydro­thermally synthesized. The polymer exhibits a doubly carboxyl­ate-bridged infinite chain-like structure with the metal center lying on a crystallographic twofold axis and coordinating by two carboxyl­ate O atoms from a chelating isonicotinate group (also lying on a twofold axis), four carboxyl­ate O atoms from four bridging isonicotinate ligands, and two water mol­ecules, to yield an eight-coordinate square-anti­prismatic geometry. [ABSTRACT FROM AUTHOR]