Poly[aqua­{μ(3)-5-[(pyridin-2-ylmeth­yl)amino]­isophthalato-κ(5) N,N′:O (1),O (1′):O (3)}cobalt(II)]

In the title polymer, {[Co(C(14)H(10)N(2)O(4))(H(2)O)]·3.5H(2)O}(n), the Co(2+) ion is coordinated by three carboxyl­ate O atoms from two 5-[(pyridin-2-ylmeth­yl)amino]­isophthalate anions, two N atoms from a (pyridin-2-ylmeth­yl)amino group and an O atom from a water mol­ecule, furnishing a distorted CoO(4)N(2) octa­hedral geometry. Each anion acts as a μ(3)-bridge, linking cobalt ions into a two-dimensional layer parallel to (100). The asymmetric unit also contains three and a half solvent water mol­ecules, which could not be modeled. Therefore, the diffraction contribution of the solvent water mol­ecules was removed by the subroutine SQUEEZE in PLATON [Spek (2009). Acta Cryst. D65, 148–155]. The crystal structure is stabilized by O—H⋯O hydrogen bonds in which the coordinated water mol­ecule acts as donor and the carboxyl­ate O atoms as acceptors.