Date Published: June 01, 2010
Publisher: International Union of Crystallography
Author(s): Min Min Zhao, Ping Ping Shi.
The crystal structure of the title compound, (C6H7FN)2[CuCl4], consists of parallel two-dimensional perovskite-type layers of corner-sharing CuCl6 octahedra. These are bonded together via N—H⋯Cl hydrogen bonds from the 4-fluoroanilinium chains, which are almost perpendicular to the layers. The CuCl4 dianions have two short Cu—Cl bonds [2.2657 (15) and 2.2884 (13) Å] and two longer bonds [2.8868 (15) Å], giving highly Jahn–Teller-distorted CuCl6 octahedra. The Cu atoms are situated on crystallographic centers of inversion.
For similar ammonium salts, see: Yuan et al. (2004 ▶); Bhattacharya et al. (2004 ▶). For the ferroelectric properties of a related ammonium metal(II) salt, see: Zhang et al. (2009 ▶); Ye et al. (2009 ▶).