Vibrational and nuclear quadrupole resonance spectra of some complexes of ICl4– and AuCl4–. Part 2. Trichlorochalcogen tetrachloroaurates [ACl3][AuCl4](A = S, Se, or Te)
Abstract
Analysis of solid-state vibrational and 35Cl n.q.r. spectra of the isomorphous compounds [SCl3][AuCl4] and [SeCl3][AuCl4] indicates that the AuCl4– ion is considerably distorted from D4h symmetry. X-Ray powder patterns show that [TeCl3][AuCl4] adopts a different crystal structure, and n.q.r. and vibrational spectra are consistent with a less severe distortion of the AuCl4– ion. The origin of the distortions is discussed in terms of possible secondary bonding interactions in the crystals.