Structures of Acylated 5-Iodo-8-Hydroxyquinoline and 5,7-Diiodo-8-Hydroxyquinoline Derivatives

Abstract

The 5-I-8-HqAc (1) and 5,7-I₂-8-HqAc (2) acyl derivatives are prepared by the interaction of 5-iodo-8-hydroxyquinoline (5-I-8-Hq) and 5,7-diiodo-8-hydroxyquinoline (5,7-I₂-8-HqAc) with acetic anhydride at 80 °C. Crystals of these compounds are obtained by the recrystallization from chloroform. The crystal structures of 1 and 2 are determined by XRD, the revealed structural features are discussed. The intermolecular contacts influencing the crystal packing are analyzed; Hirshfeld surfaces are constructed. It is shown that the monoiodide contains short I⋯N halogen bonds, whereas the diiodide contains only short I⋯I contacts.