Crystal structure of 8-iodo­quinolinium tetra­chlorido­aurate(III)

The structure of the title salt, (C(9)H(7)IN)[AuCl(4)], 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 [AuCl(4)](−) anions, in each case with the central Au(III) 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.