Crystal structures of three lead(II) acetate-bridged di­amino­benzene coordination polymers

Poly[tris­(acetato-κ(2) O,O′)(μ(2)-acetato-κ(3) O,O′:O)tetra­kis­(μ(3)-acetato-κ(4) O,O′:O:O′)bis­(benzene-1,2-di­amine-κN)tetra­lead(II)], [Pb(4)(CH(3)COO)(8)(C(6)H(8)N(2))(2)](n), (I), poly[(acetato-κ(2) O,O′)(μ(3)-acetato-κ(4) O,O′:O:O′)(4-chloro­benzene-1,2-diamine-κN)lead(II)], [Pb(CH(3)COO)(2)(C(6)H(7)ClN(2))](n), (II), and poly[(κ(2) O,O′)(μ(3)-acetato-κ(4) O,O′:O:O′)(3,4-di­amino­benzo­nitrile-κN)lead(II)], [Pb(CH(3)COO)(2)(C(7)H(7)N(3))](n), (III), have polymeric structures in which monomeric units are joined by bridging acetate ligands. All of the Pb(II) ions exhibit hemidirected coordination. The repeating unit in (I) is composed of four Pb(II) ions having O(6), O(6)N, O(7) and O(6)N coordination spheres, respectively, where N represents a monodentate benzene-1,2-di­amine ligand and O acetate O atoms. Chains along [010] are joined by bridging acetate ligands to form planes parallel to (10-1). (II) and (III) are isotypic and have one Pb(II) ion in the asymmetric unit that has an O(6)N coordination sphere. Pb(2)O(2) units result from a symmetry-imposed inversion center. Polymeric chains parallel to [100] exhibit hydrogen bonding between the amine and acetate ligands. In (III), additional hydrogen bonds between cyano groups and non-coordinating amines join the chains by forming R (2) (2)(14) rings.