Crystal structure and Hirshfeld surface analysis of 8-azaniumylquinolinium tetrachloridozincate(II)

Abstract

The reaction of 8-aminoquinoline, zinc chloride and hydrochloric acid in ethanol yielded the title salt, (C9H10N2)[ZnCl4], which consists of a planar 8-azaniumylquinolinium dication and a tetrahedral tetrachlorozincate dianion. The 8-aminoquinoline moiety is protonated at both the amino and the ring N atoms. In the crystal, the cations and anions are connected by intermolecular N—H...Cl and C—H...Cl hydrogen bonds, forming sheets parallel to (001). Adjacent sheets are linked through π–π interactions involving the pyridine and arene rings of the 8-azaniumylquinolinium dication. Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H...Cl (48.1%), H...H (19.9%), H...C/C...H (14.3%) (involving the cations) and H...Cl (82.6%) (involving the anions) interactions.

Keywords

• 8-aminoquinoline
• intermolecular interactions
• crystal structure
• hydrogen bonding
• π–π stacking
• hirshfeld surface