The title compound, catena‐poly­[[(heptanoato‐O,O′)­lead(II)]‐μ‐heptanoato‐O,O′:O:O′], [Pb(C7H13O2)2], is a metallic soap which can be used as a corrosion inhibitor since it forms a passive film at the Pb surface. Its structure is characterized by two‐dimensional layers parallel to the bc plane. The layers are packed through van der Waals interactions along the a direction and form blocks parallel to (001). The 6s2 lone pair of electrons on PbII is stereochemically active in this compound, which leads to a hemidirected octahedral geometry for the O‐environment around the Pb atoms.

The structure of the title compound, poly­[zinc(II)‐bis(μ‐octanoato‐O:O′)], [Zn(C8H15O2)2]n, consists of polymeric sheets parallel to (100) in which tetrahedrally coordinated Zn2+ cations are connected by carboxyl­ate bridges in a syn–anti arrangement.

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ECM Nancy s169 conference abstracts o.m9.o5 Structural and thermal properties of carboxylates protecting metals against aqueous corrosion.