Cinnarizinium dipicrate

Abstract

In the cinnarizinium dication of the title compound {systematic name: 1-diphenyl-methyl-4-[(2E)-3-phenyl-prop-2-en-1-yl]piperazine-1,4-diium bis-(2,4,6-trinitro-phenolate)}, C(26)H(30)N(2) (2+)·2C(6)H(2)N(3)O(7) (-), the piperazine group is protonated at both N atoms and adopts a slightly distorted chair conformation. Strong N-H⋯O(hy-droxy) cation-anion hydrogen bonds link the dication and two anions. In the cation, the (2E)-3-phenyl-prop-2-en-1-yl fragment is disordered over two positions in a ratio of 0.586 (4): 0.414 (4). Two nitro groups in one anion and three in the other one demonstrate rotational disorder. The crystal packing is stabilized by weak inter-molecular π-π [centroid-centroid distances = 3.844 (7), 3.677 (9), 3.825 (5), 3.634 (2) and 3.729 (7) Å], C-H⋯π and C-H⋯O inter-actions.