catena-Poly[[lead(II)-μ-N′-[1-(pyridin-2-yl-κN)ethylidene]isonicotinohydrazidato-κ3N′,O:N1] perchlorate]

Abstract

The PbII atom in the polymeric title compound, {[Pb(C13H11N4O)]ClO4}n, is coordinated by the N′-[1-(pyridin-2-yl-κN)ethylidene]isonicotinohydrazidate ligand via its O,N,N′-donors and simultaneously bridged by a neighbouring ligand via the pyridin-2-yl N atom. The resultant supramolecular chain is a zigzag along the a axis. The stereochemistry of the PbII atom is defined by an N3OE donor set (E = lone pair of electrons), which results in a Ψ-trigonal–bipyramidal coordination with the O and pyridin-2-yl N atoms in axial positions. The dihedral angle between the pyridine rings of the ligand is 6.3 (3)°. The supramolecular cationic chains are linked into a three-dimensional array via secondary Pb...O [3.133 (6) and 3.28 (7) Å] and Pb...N [3.028 (4) Å] interactions. Weak C—H...O interactions and aromatic π–π stacking [centroid–centroid separation = 3.693 (2) Å] also occur in the crystal.