Tris(hy­droxy­meth­yl)methanaminium trifluoro­acetate

In the crystal structure of the title salt, C₄H₁₂NO₃⁺·C₂F₃O₂⁻, N—H...O and O—H...O hydrogen bonds link the ions, forming a complex three-dimensional network.

3-Methyl­anilinium 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).

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.

Bis(2-trifluoro­methyl-1H-benzimidazol-3-ium) naphthalene-1,5-disulfonate

The asymmetric unit of the title compound, C₈H₆F₃N₂⁺·0.5C₁₀H₆O₆S₂²⁻, 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.

Tetra­kis(4-meth­oxy­anilinium) hexa­chloridobismuthate(III) chloride monohydrate

In the crystal of the title compound, (C₇H₁₀NO)₄[BiCl₆]Cl·H₂O, the Bi^III cation is located on an inversion center and coordinated by six Cl⁻ anions in a slightly distorted octa­hedral geometry; the uncoordinated Cl⁻ anion and lattice water mol­ecule are located on a twofold rotation axis. Two independent 4-meth­oxy­anilinium cations are linked to the Bi complex, the uncoordinated Cl⁻ anion and lattice water mol­ecule via N—H...Cl and N—H...O hydrogen bonds.

Bis(3-methyl­anilinium) hexa­chlorido­stannate(IV) dihydrate

In the title compound, (C₇H₁₀N)₂[SnCl₆]·2H₂O, the Sn^IV 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.

Bis(2-trifluoro­methyl-1H-benzimidazol-3-ium) tetra­chloridomercurate dihydrate

In the title compound, (C₈H₆F₃N₂)₂[HgCl₄]·2H₂O, the Hg^II 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.

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

Ihe title salt, C₈H₆F₃N₂⁺·NO₃⁻, the F atoms of the triflouromethyl group are disordered over two sets of sites in a 0.58 (2):0.42 (2) ratio. In the crystal, N—H...O hydrogen bonds link the cations and anions into chains running parallel to the b axis. There is π–π stacking between symmetry-related benzene rings with a centroid-centroid distance of 3.949 (3) Å. The crystal studied was a non-merohedral twin, with a 19% minor component.

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.

1-Acetyl­oxymethyl-1,3,5,7-tetra­aza­adamantan-1-ium hexa­fluoro­phosphate

In the crystal structure of the title salt, C₉H₁₇N₄O₂⁺·PF₆⁻, the cations and anions are linked by weak C—H...F inter­actions while C—H...O inter­actions also occur between the cations.

5-Nitro-2-trifluoro­methyl-1H-benzimidazole monohydrate

In the crystal structure of the title compound, C₈H₄F₃N₃O₂·H₂O, the main mol­ecule and the water mol­ecule are linked by an N—H...O hydrogen bond. O—H...N, O—H...O and C—H...O hydrogen bonds further link the mol­ecules into sheets.

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(3-methyl­anilinium) naphthalene-1,5-disulfonate

In the crystal of the title mol­ecular salt, 2C₇H₁₀N⁺·C₁₀H₆O₆S₂²⁻, the naphthalene-1,5-disulfonate anion is located on an inversion center and accepts N—H...O hydrogen bonds from the 3-methyl­anilinium cations, forming supra­molecular layers parallel to the ac plane.