BIS(4-NITROANILINIUM) TETRACHLOROCADMATE

An aromatic cation-based perovskite-type layered crystal of bis(4-nitr oanilinium) tetrachlorocadmate, (C6H7N2O2)(2)[CdCl4], was obtained. X- ray diffraction analysis of a single crystal revealed it to have a lay ered structure consisting of alternating organic bilayers and inorgani c sheets. Cd ions and Cl anions form six-coordinate octahedra whose eq uatorial corner anions are shared with the neighbouring octahedra, The organic bilayer has a 'tail-to-tail' structure, showing that the mole cular arrangement is mainly determined by the inorganic layer structur e, not by the intermolecular dipolar interaction of the 'push-pull' ty pe molecule.