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 generateR22(11) loops and these chains are linkedviaanother C—H...O contact which encloses anR24(10) loop. Adjacent anions and cations are connected through N—H... O hydrogen bonds, generating anR22(8) loop. Two pairs of anions and cations are linked by N—H...O hydrogen bonds, forming a tetramer with anR22(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.
Highlights
In the title molecular salt, C6H9N2+ÁC8H6NO4À, the cation is protonated at its pyridine N atom
The anions are connected by a pair of C—HÁ Á ÁO contacts into [100] chains, which generate R22(11) loops and these chains are linked via another C—HÁ Á ÁO contact which encloses an R42(10) loop
Adjacent anions and cations are connected through N—HÁ Á Á O hydrogen bonds, generating an R22(8) loop
Summary
The asymmetric unit of of the title salt consists of a 2-amino-4-methylpyridinium cation (protonated at the pyridine N atom) and a 2-(4-nitrophenyl)acetate anion (Fig. 1). The anions are connected by C—HÁ Á ÁO [C3—H3Á Á ÁO2iii and C6—H6Á Á ÁO3vi] contacts into [100] chains, generating an R22(11) loop; these chains are further linked via C5— H5Á Á ÁO3iv [symmetry codes: (iii) 1 + x, y, z; (iv) Àx, 1 À y, Àz; (vi) x À 1, y, z] contacts, enclosing R42(10) loops (Table 1 and Fig. 2). C13 rings, respectively] interactions, forming a three-dimensional network (Fig. 4)
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