Abstract
In the cation of the title compound [systematic name: (RS)-4-(3-carboxy-1-ethyl-6,8-difluoro-4-oxo-1,4-dihydroquinolin-7-yl)-2-methylpiperazin-1-ium 2,4,6-trinitrophenolate], C17H20F2N3O3 +·C6H2N3O7 −, the piperazine ring adopts a slightly distorted chair conformation and contains a protonated N atom. An intramolecular O—H⋯O hydrogen bond occurs in the cation. The dihedral angles between the mean planes of the six-atom piperazine ring and the 10-atom fused ring system is 43.3 (5)°. The picrate anion interacts with the protonated N atom of an adjacent cation through a bifurcated N—H⋯(O,O) three-center hydrogen bond. Strong N—H⋯O hydrogen bonds in concert with weak π–π stacking interactions [centroid–centroid distance = 3.6460 (14) Å] dominate the crystal packing, creating a two-dimensional network structure along [011].
Highlights
In the cation of the title compound [systematic name: (RS)-4(3-carboxy-1-ethyl-6,8-difluoro-4-oxo-1,4-dihydroquinolin-7yl)-2-methylpiperazin-1-ium 2,4,6-trinitrophenolate], C17H20F2N3O3+C6H2N3O7, the piperazine ring adopts a slightly distorted chair conformation and contains a protonated N atom
An intramolecular O—H O hydrogen bond occurs in the cation
The dihedral angles between the mean planes of the six-atom piperazine ring and the 10-atom fused ring system is 43.3 (5)
Summary
Street NW, Washington, DC 20059, USA, and cDepartment of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India
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