catena-Poly[tetrakis(3-phenylpropylammonium) [iodoplumbate(II)-tri-mu-iodo-plumbate(II)-tri-mu-iodo-iodoplumbate(II)-di-mu-iodo]].

The title compound, {(C9H14N)4[Pb3I10]}n, crystallizes as an organic-inorganic hybrid. As such, the structure consists of a two-dimensional inorganic layer of [Pb3I10]n(4n-) ions extending along [100]. The asymmetric unit contains two independent Pb atoms, viz. one in a general position and the other on an inversion centre. Each Pb atom is octahedrally coordinated by six iodide ions and exhibits both face- and corner-sharing with adjacent atoms in the inorganic layer. These anionic layers alternate with 3-phenylpropylammonium cations, which hydrogen bond to the iodides. Simple face-to-edge sigma-pi stacking interactions are observed between the aromatic rings that stabilize the overall three-dimensional structure. This net structure has only been observed five times previously.