Date Published: August 01, 2012
Publisher: International Union of Crystallography
Author(s): Hoong-Kun Fun, Tze Shyang Chia, Gamal A. E. Mostafa, Mohamed M. Hefnawy, Hatem A. Abdel-Aziz.
In the title compound, C19H15N4+·Br−·C2H5OH, the tetrazole ring makes dihedral angles of 57.44 (9), 50.92 (9) and 4.65 (8)° with the attached phenyl rings. In the crystal, the cation and the anion are linked to each other by intermolecular C—H⋯Br hydrogen bonds into an infinite chain along the b axis. The anion and the ethanol solvent molecule are linked by an O—H⋯Br hydrogen bond. The crystal studied was an inversion twin with a refined component ratio of 0.632 (5):0.368 (5).
For the biological activity of the triphenyltetrazolium ion, see: Mostafa (2007 ▶); Hassanien et al. (2003 ▶); Abbas et al. (2001 ▶). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986 ▶).