Research Article: 3,3′-[1,4-Phenyl­enebis(methyl­ene)]­bis­(1-propyl­benzimidazolium) dichloride dihydrate

Date Published: March 01, 2012

Publisher: International Union of Crystallography

Author(s): Rosenani A. Haque, Muhammad Adnan Iqbal, Safaa A. Ahmad, Tze Shyang Chia, Hoong-Kun Fun.


The asymmetric unit of the title compound, C28H32N42+·2Cl−·2H2O, contains half of a 3,3′-[1,4-phenyl­enebis(methyl­ene)]bis­(1-propyl­benzimidazolium) cation, one chloride anion and one water mol­ecule. The complete cation is generated by a crystallographic inversion center. The central benzene ring forms a dihedral angle of 66.06 (11)° with its adjacent benzimidazolium ring system. In the crystal, the cations, anions and water mol­ecules are linked by O—H⋯Cl, C—H⋯O and C—H⋯Cl hydrogen bonds into a three-dimensional network. The crystal packing is further stabilized by π–π inter­actions, with centroid–centroid distances of 3.5561 (15) and 3.6708 (15) Å.

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For details and applications of benzimidazole derivatives, see: Narasimhan et al. (2012 ▶). For related structures, see: Haque et al. (2011 ▶, 2012 ▶); Iqbal et al. (2012 ▶). For reference bond lengths, see: Allen et al. (1987 ▶). For the stability of the temperature controller used for data collection, see: Cosier & Glazer (1986 ▶).