Bis(μ-imino­diacetato)bis­[(2,2′-diamino-4,4′-bi-1,3-thia­zole)lead(II)] tetra­hydrate

In the crystal structure of the title compound, [Pb(2)(C(4)H(5)NO(4))(2)(C(6)H(6)N(4)S(2))(2)]·4H(2)O, the dinuclear Pb(II) complex mol­ecule is centrosymmetric. The Pb atom is chelated by a tridentate imino­diacetate anion (IDA) and a diamino­bithia­zole (DABT) ligand, while a carboxyl­ate O atom from an adjacent IDA anion further bridges the Pb atom with a longer Pb—O bond [2.892 (3) Å]. The lone-pair electrons of the Pb atom occupy an axial site in the Ψ-penta­gonal-bipyramidal coordination polyhedron. The IDA anion displays a facial configuration: its chelating five-membered rings assume an envelope configuration. Within the DABT ligand, the two thia­zole rings are twisted relative to each other, making a dihedral angle of 9.51 (17)°. Extensive N—H⋯O, O—H⋯O and weak C—H⋯O hydrogen bonding helps to stabilize the crystal structure.