Hydrogen bonding in proton-transfer compounds of 8-quinolinol(oxine) with aromatic sulfonic acids

Abstract

The crystal structures of the proton-transfer compounds of 8-quinolinol (oxine) with the aromatic sulfonic acids 2-aminobenzenesulfonic acid (orthanilic acid) and 8-hydroxy-7-iodoquinoline-5-sulfonic acid (ferron) have been determined. In both 8-hydroxyquinolinium 2-aminobenzenesulfonate, C9H8NO+烶H6NO3S-, (I), and 8-hydroxyquinolinium 8-hydroxy-7-iodoquinoline-5-sulfonate sesquihydrate, C9H8NO+烹H5INO4S-籮5H2O, (II), extensive hydrogen-bonding interactions, together with significant cation-cation [in (I)] and cation-anion [in (II)] - stacking associations, give rise to layered polymer structures. Formula: C9H8NO+烶H6NO3S- and C9H8NO+烹H5INO4S-籮5H2O