catena-Poly[[[triaqua­sulfatozinc(II)]-μ-3,3′-bis­(3-pyrid­yl)-1,1′-(m-phenyl­ene)diurea] methanol solvate monohydrate]

In the title coordination polymer, {[Zn(SO(4))(C(18)H(16)N(6)O(2))(H(2)O)(3)]·CH(3)OH·H(2)O}(n), the Zn(2+) ion adopts a slightly distorted cis-ZnN(2)O(4) octa­hedral geometry arising from three coordinated water mol­ecules, one sulfate ion and two bridging 3,3′-bis­(3-pyrid­yl)-1,1′-(m-phenyl­ene)diurea (bpmpbu) ligands. The dihedral angles between the central benzene ring and two terminal pyridine rings of the bpmbpu mol­ecule are 10.58 (17) and 34.63 (16)°. In the crystal, the ligands bridge the Zn(II) ions, thus generating a one-dimensional zigzag coordination polymer propagating in [010]. The crystal structure features extensive N—H⋯O and O—H⋯O hydrogen-bonding inter­actions.