Crystal structure of 8-iodoquinolinium tetrachloridoaurate(III)

Abstract

The structure of the title salt, (C9H7IN)[AuCl4], is comprised of planar 8-iodoquinolinium cations (r.m.s. deviation = 0.05 Å) and square-planar tetrachloridoaurate(III) anions. The asymmetric unit contains one 8-iodoquinolinium cation and two halfs of [AuCl4]− anions, in each case with the central AuIII atom located on an inversion center. Intermolecular halogen–halogen contacts were found between centrosymmetric pairs of I [3.6178 (4) Å] and Cl atoms [3.1484 (11), 3.3762 (13), and 3.4935 (12) Å]. Intermolecular N—H...Cl and C—H...Cl hydrogen bonding is also found in the structure. These interactions lead to the formation of a three-dimensional network. Additionally, there is an intramolecular N—H...I hydrogen bond between the aromatic iminium and iodine. There are no aurophilic interactions or short contacts between I and Au atoms, and there are no notable π-stacking interactions between the aromatic cations.

Keywords

• crystal structure
• 8-iodoquinolinium cation
• tetrachloridoaurate anion
• salt structure