title: 1-Butyl-3-(1-naphthyl-meth-yl)benzimidazolium hemi{di-μ-iodido-bis-[diiodidomercurate(II)]} dimethyl sulfoxide monosolvate.
abstract: In the title compound, (C(22)H(23)N(2))[Hg(2)I(6)](0.5)·(CH(3))(2)SO, the 1-butyl-3-(1-naphthyl-meth-yl)benzimidazolium anion lies across a centre of inversion. The dihedral angle between the benzimidazolium and naphthalene ring systems is 81.9 (3)°. In the crystal structure, π-π stacking inter-actions are observed between the imidazolium ring and the unsubstituted benzene ring of the naphthalene ring system, with a centroid-centroid separation of 3.510 (5) Å. In the centrosymmetric anion, the Hg(II) atoms are in a distorted tetrahedral coordination. The dimethyl sulfoxide solvent mol-ecule is disordered over two sites with occupancies of 0.615 (9) and 0.385 (9).
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Wang
authors.forename: Gang
authors.initials: G
authors.lastname: Shen
authors.forename: Zhan-Ying
authors.initials: ZY
authors.lastname: Zheng
authors.forename: Xiu-Mei
authors.initials: XM
authors.lastname: Wu
authors.forename: Qing-Xiang
authors.initials: QX
authors.lastname: Liu