1-Piperonylpiperazinium picrate.
IN THE CATION OF THE TITLE SALT [SYSTEMATIC NAME: 4-(2H-1,3-benzodioxol-5-ylmeth-yl)piperazin-1-ium 2,4,6-tri-nitro-phen-o-late], C12H17N2O2 (+)·C6H2N3O7 (-), the piperazine ring adopts a slightly disordered chair conformation. The piperonyl ring system and the piperazine ring are twisted with respect to each other with an N-C-C-C torsion angle of 40.7 (2)°. In the anion, the dihedral angles between the mean planes of the nitro substituents ortho to the phenolate O atom and the mean plane of the phenyl ring are 28.8 (9) and 32.2 (8)°. In contrast, the nitro group in the para position lies much closer to the aromatic ring plane, subtending a dihedral angle of 3.0 (1)°. In the crystal, the cations and anions inter-act through N-H⋯O hydrogen bonds and a weak C-H⋯O inter-action. Weak C-H⋯O inter-actions are also observed between the anions, forming R 2 (2)(10) graph-set ring motifs. In addition, a weak centroid-centroid π-π stacking inter-action between the aromatic rings of the cation and the anion, with an inter-centroid distance of 3.7471 (9) Å, contributes to the crystal packing, resulting in a two-dimensional network along (10-1).
Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India.
Channappa N
CN
Kavitha
Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India.
Manpreet
M
Kaur
Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA.
Brian J
BJ
Anderson
Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA.
Jerry P
JP
Jasinski
Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India.
H S
HS
Yathirajan