Intermolecular Arrangements of p-Substituted Aniliniums in the Interlayer of Cupric Chloride

Abstract

Abstract Crystal structures and magnetic properties of the layered pervoskite compounds, (p-X-C6H4NH3 +)2CuCl4 2-with X=CN (1), Cl(2), and NO2 (3), were studied. The compound 1 crystallizes in the triclinic P 1 space group. The structure consists of a CuCl layer and an organic bilayer in which the molecular axis of the cyanoanilinium is nearly perpendicular to the inorganic layer. At the middle of the organic bilayer, there is a layer of the CN group, in which the CN groups are arranged to cancel their electric dipoles. The compound 2 has a similar structure to that of 1. The crystal of 3 belongs to the orthorhombic Pbca space group, in which the structure also consists of an inorganic layer and an organic bilayer. The bilayer is formed by short contacts between the NO2 groups, which appear to incline the molecular axis of the nitroanilinium with respect to the normal to the CuCl layer. AC and DC magnetic susceptibility measurements were carried out on the three salts. Their behavior can be understood wit...