Research Article: 3,3′-[1,2-Phenyl­enebis(methyl­ene)]bis­(1-octylbenzimidazolium) dibromide monohydrate

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Rosenani A. Haque, Muhammad Adnan Iqbal, Hoong-Kun Fun, Suhana Arshad.


In the title hydrated mol­ecular salt, C38H52N42+·2Br−·H2O, the central benzene ring of the dication makes dihedral angles of 89.47 (13) and 72.69 (12)° with the pendant benzimidazol-3-ium rings. The conformations of the octyl side chains are completely different. In the crystal, the components are linked by O—H⋯Br, C—H⋯Br and C—H⋯O hydrogen bonds into a two-dimensional network lying parallel to the ac plane. Aromatic π–π stacking inter­actions are also observed [shortest centroid-to-centroid separation = 3.5047 (16) Å].

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For related structures, see: Haque et al. (2012 ▶); Iqbal et al. (2012 ▶); Haque et al. (2011 ▶). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986 ▶).