Ming-Liang Liu

2-Trifluoro­methyl-1H-benzimidazol-3-ium perchlorate

In the title salt, C8H6F3N2 +·ClO4 −, the atoms of the benzimidazole ring (including H atoms) are nearly coplanar (r.m.s. deviation of the fitted atoms = 0.0122 Å) and the triflouromethyl group lies out of this plane. The perchlorate anion adopts a distorted tetrahedral conformation with the Cl—O bond distances ranging from 1.412 (3) to 1.439 (2) Å. The benzimidazolium cations are linked to adjacent anions by intermolecular N—H⋯O hydrogen bonds, forming chains.

2-Trifluoro-methyl-1H-benzimidazol-3-ium hydrogen sulfate.

In the crystal of the title molecular salt, C8H6F3N2 +·HSO4 −, cation-to-anion N—H⋯O hydrogen bonds generate [100] chains. Anion-to-anion O—H⋯O hydrogen bonds generate [001] helices and cross-link the chains into a three-dimensional network.

Tris(3-methyl­anilinium) penta­chlorido­anti­monate(III) chloride

In the title compound, (C7H10N)3[SbCl5]Cl, the SbIII cation is coordinated by five Cl− anions in a distorted square-pyramidal geometry, in which the longest Sb—Cl distance of 3.0319 (14) Å indicates a weak coordination bond. In the crystal, the 3-methylanilinium cations link with the complex antimonate anions and Cl− anions via N—H⋯Cl hydrogen bonds.

Bis(2-trifluoro-methyl-1H-benzimidazol-3-ium) naphthalene-1,5-disulfonate.

The asymmetric unit of the title compound, C8H6F3N2 +·0.5C10H6O6S2 2−, consists of one 2-trifluoromethyl-1H-benzimidazol-3-ium cation and a half naphthalene-1,5-disulfate anion, which are linked by an N—H⋯O hydrogen bond. The anion sits across a centre of symmetry. The atoms of the benzimidazole ring are nearly coplanar (r.m.s. deviation of the fitted atoms = 0.0085 Å) and the triflouromethyl group lies out of this plane. In the crystal, the cations are linked to adjacent anions by N—H⋯O hydrogen bonds, forming a ladder structure parallel to the a axis in which the anions form the rungs. Adjacent ladders are linked by weak C—H⋯O interactions, forming sheets parallel to the ac plane.

Morpholin-4-ium hydrogen tartrate.

In the title molecular salt, C4H10NO+·C4H5O6 −, the morpholinium cation adopts a chair conformation. The conformation of the C—C—C—C backbone of the monotartrate anion is close to anti [torsion angle = 173.18 (17)°], which is supported by two intramolecular O—H⋯O hydrogen bonds. In the crystal, the components are linked by N—H—O and O—H—O hydrogen bonds, generating (001) sheets.

3-Methyl-anilinium hydrogen phthalate.

The asymmetric unit of the title salt, C7H10N+·C8H5O4 −, consists of two 3-methylphenylammonium cations and two hydrogen phthalate anions. There are strong intramolecular O—H⋯O hydrogen bonds in the virtually planar (r.m.s. deviations = 0.054 Å) phthalate anions. In the crystal, the cations and anions are connected via an extensive sytem of N—H⋯O hydrogen bonds into a corrugated layer extended parallel to (001).

2-Trifluoro­methyl-1H-benzimidazol-3-ium tetra­fluoro­borate–2-trifluoro­methyl-1H-benzimidazole–water (1/1/1)

The asymmetric unit of the title compound, C8H6F3N2 +·BF4 −·C8H5F3N2·H2O, consists of two 2-trifluoromethylbenzimidazole molecules, each of which is protonated on a 50% basis, one tetrafluoroborate anion and a water molecule. The two 2-trifluoromethylbenzimidazole molecules thus exist as half-neutral half-cation entities. They are linked by N—H⋯N hydrogen bonds involving the half-occupancy hydrogens in each molecule. The F atoms of one of the trifluoromethyl groups are disordered over two sets of sites [in a 0.518 (14):0.482 (14) ratio], as are the F atoms of the tetrafluoroborate anion [0.507 (14):0.493 (14) ratio]. The water molecule is linked to one of the 2-trifluoromethylbenzimidazole molecules via an N—H⋯O hydrogen bond.

2-Trifluoro­methyl-1H-benzimidazole

The asymmetric unit of the title compound, C8H5F3N2, consists of two half-molecules, one lies on a mirror plane and the other is generated by twofold rotation symmetry, with the axis running through the trifluoromethyl C atom and the attached benzimidazole C atom. The two 2-trifluoromethyl-1H-benzimidazole molecules are connected by N—H⋯N hydrogen bonds involving the disordered NH H atoms into chains running parallel to the c axis. One of the trifluoromethyl groups is disordered over two orientations of equal occupancy.

Bis(2-trifluoro-methyl-1H-benzimidazol-3-ium) tetra-chloridomercurate dihydrate.

In the title compound, (C8H6F3N2)2[HgCl4]·2H2O, the HgII cation is coordinated by four Cl− anions in a distorted tetrahedral geometry. In the crystal, the 2-trifluoromethyl-1H-benzimidazolium cations link to the [HgCl4]2− complex anions and lattice water molecules via N—H⋯Cl and N—H⋯O hydrogen bonds, and the lattice water molecules further link to the Hg complex anion and the organic cations via O—H⋯Cl and O—H⋯F hydrogen bonding. One of the trifluoromethyl groups is disordered over two orientations in a 0.59 (4):0.41 (4) ratio.

Bis(3-methyl-anilinium) hexa-chlorido-stannate(IV) dihydrate.

In the title compound, (C7H10N)2[SnCl6]·2H2O, the SnIV atom lies on a site with symmetry 2/m. One of the Cl atoms lies on a mirror plane and the 3-methylanilinium cation is also situated on a mirror plane. The water molecule is located on a twofold rotation axis. The H atoms of the methyl and ammonium groups and the solvent water molecule are disordered by symmetry. In the crystal, N—H⋯Cl, O—H⋯Cl and N—H⋯O hydrogen bonds connect the organic cations, the inorganic octahedrally shaped anions and the water molecules.