In the crystal structure of the title salt, (C(5)H(9)N(2))(2)[CuCl(4)], the organic cations and the tetrahedral [CuCl(4)] anions are linked into a three-dimensional network by N-H⋯Cl hydrogen bonds. The two 2-ethyl imidazolium cations in the asymmetric unit differ in the orientation of the ethyl group, with N-C-C-C torsion angles of -170.0 (4) and -87.6 (5)°.

The crystal structure of the title compound, (C(5)H(9)N(2))(2)[HgCl(4)], consists of discrete tetra-chloridomercurate dications and discrete 2-methyl-imidazolium cations. In the complex anion, the mercury cations are coordinated by four chloride anions with distances between 2.4568 (14) and 2.4936 (15) Å in a tetra-hedral geometry. In the crystal, the cations and anions are connected by inter-m...

In the crystal structure of 1-methyl-3-allyl benzotriazolium iodide, C(10)H(12)N(3) (+)·I(-), centrosymmetric dimers of coplanar cations are π-stacked with an inter-planar distance of 3.453 (6) Å. The iodide anions are situated above and below the formally positive charged triazolium rings.