2-Amino-4-methylpyridinium 2-(4-nitrophenyl)acetate

Abstract

In the title molecular salt, C6H9N2+·C8H6NO4−, the cation is protonated at its pyridine N atom. In the crystal, the anions are connected by a pair of C—H...O contacts into [100] chains, which generate R22(11) loops and these chains are linked via another C—H...O contact which encloses an R24(10) loop. Adjacent anions and cations are connected through N—H... O hydrogen bonds, generating an R22(8) loop. Two pairs of anions and cations are linked by N—H...O hydrogen bonds, forming a tetramer with an R22(8) loop motif. The packing also features weak C—H...π and π–π [centroid-to-centroid distances = 3.8972 (11) and 3.9549 (10) Å] interactions, which result in a three-dimensional network.

Keywords

• crystal structure
• molecular salt
• hydrogen bonding