Oxonium picrate

Abstract

The title compound, H3O+·C6H2N3O7 −, consists of one picrate anion and one oxonium cation. The oxonium cation is located on a crystallographic twofold axis and both its H atoms are disordered, each over two symmetry-equivalent positions with occupancy ratios of 0.75. The picrate anions are also located on twofold axes bis­ecting the phenolate and p-nitro groups. π–π inter­actions between the rings of the picrates [centroid-to-centroid distances of 3.324 (2) Å] connect the anions to form stacks along the a-axis direction. The stacks are further joined together by the protonated water mol­ecules through hydrogen bonds to form two-dimensional sheets extending parallel to the ab plane. The sheets are stacked on top of each other along the c-axis direction and connected through C—H⋯O inter­actions between the CH groups of the benzene rings and the picrate nitro groups, with C⋯O distances of 3.450 (2) Å.

3-Chloro-4-fluoroanilinium picrate

“…For related structures, see: Jin et al (2011); Wang (2011); Betz et al (2011); Dutkiewicz et al (2011); Jasinski et al (2010aJasinski et al ( ,b, 2011. For graph-set analysis of hydrogen bonds, see: Etter et al (1990); Bernstein et al (1995).…”

“…(2013). E69, o240 (Jin et al, 2011;Wang, 2011;Betz et al, 2011;Dutkiewicz et al, 2011;Jasinski et al, 2011;Jasinski et al, 2010a;Jasinski et al, 2010b). In continuation of our studies of structural aspects of simple organic salts of amine bases, the title compound was synthesized.…”