catena-Poly[[[bis­(methanol-κO)lead(II)]-μ-N′-[1-(pyridin-2-yl-κN)ethyl­idene]isonicotinohydrazidato-κ(3) N′,O:N (1)] perchlorate]

The Pb(II) atom in the polymeric title compound, {[Pb(C(13)H(11)N(4)O)(CH(3)OH)(2)]ClO(4)}(n), is coordinated by an N′-[1-(pyridin-2-yl-κN)ethyl­idene]isonicotinohydrazidate ligand via O,N,N′-donors and simultaneously bridged by a neighbouring ligand via the isonicotinoyl N atom; two additional sites are occupied by methanol O atoms. The resultant supra­molecular chain is a zigzag along the c axis. The Pb(II) atom is seven-coordinated within an N(3)O(3) donor set and a lone pair of electrons, which defines a Ψ-pentagonal–bipyramidal coordination geometry with the pyridine N and lone pair in axial positions. The supra­molecular chains are linked into the two-dimensional array via inter­molecular Pb⋯N [3.020 (4) Å] inter­actions. Layers stack along the a axis, being connected by O—H⋯O hydrogen bonds formed between the coordinated methanol mol­ecules and perchlorate anions.