Crystal structure and Hirshfeld analysis of poly[bis-(N,O-di-methyl-hydroxyl-ammonium) [di-μ2-iodido-di-iodido-plumbate(II)]].

The title compound, {(C2H8NO)2[PbI4]} n , represents a layered organic-inorganic perovskite, crystallizing in space group C2/c. The asymmetric unit comprises one N,O-di-methyl-hydroxyl-ammonium cation, one Pb2+ cation located on a twofold rotation axis, and two iodide anions. The Pb2+ cation is coordinated by six iodido ligands, generating a slightly distorted octa-hedral {PbI6} unit. The octa-hedra are connected by corner-sharing of equatorial I- ligands to form polymeric inorganic sheets extending parallel to the ab plane. These sheets are separated by double layers of the organic cations, producing a typical di-periodic perovskite-type arrangement with stacking of the layers along the c axis. Neighbouring inorganic layers are shifted relative to each other along both the a and b axes. The N,O-di-methyl-hydroxyl-ammonium cation engages in two N-H⋯I hydrogen bonds directed toward axially bound iodido ligands, which consolidates the packing of the crystal structure.