Crystal structure of 7,7′-[(pyridin-2-yl)methylene]bis(5-chloroquinolin-8-ol)

Abstract

In the title compound, C24H15Cl2N3O2, one quinoline ring system is essentially planar and the other is slightly bent. An intramolecular O—H...N hydrogen bond involving the hydroxy group and a pyridine N atom forms an S(5) ring motif. In the crystal, two molecules are associated into an inversion dimer with two R 2 2(7) ring motifs through intermolecular O—H...N and O—H...O hydrogen bonds. The dimers are further linked by an intermolecular C—H...O hydrogen bond and four C—H...π interactions, forming a two-dimensional network parallel to (001).

Crystal structure of the 1:1 co-crystal 4-(dimethylamino)pyridin-1-ium 8-hydroxyquinoline-5-sulfonate–N,N-dimethylpyridin-4-amine

“…In addition, the supramolecular synthon preference of pyridinium salts to 8-hydroxyquinoline-5-sulfonate (HqSA À ) and various sulfonates has been investigated (Ganie et al, 2021). On the other hand, quinolin-8-ol and its sulfonated derivative, quinoline-8-ol sulfonic acid (H 2 qSA), are well-known chelating ligands and analytical reagents (Wiberley et al, 1949;Kashiwagi et al, 2020;Kubono et al, 2023). H 2 qSA shows higher solubility to water than quionolin-8-ol, especially under basic conditions.…”