Isostructural crystal packing and hydrogen bonding in alkyl­ammonium tin(IV) chloride compounds

The three isostructural compounds butyl­ammonium hexa­chlorido­tin(IV), pentyl­ammonium hexa­chlorido­tin(IV) and hexyl­ammonium hexa­chlorido­tin(IV), (C_nH_2n+1NH₃)₂[SnCl₆], with n = 4, 5 and 6, respectively, crystallize as inorganic-organic hybrids. As such, the structures consist of layers of [SnCl₆]^2- octa­hedra, separated by hydro­carbon layers of inter­digitated butyl­ammonium, pentyl­ammonium or hexyl­ammonium cations. Corrugated layers of cations alternate with tin(IV) chloride layers. The asymmetric unit in each compound consists of an anionic component comprising one Sn and two Cl atoms on a mirror plane, and two Cl atoms in general positions; the two cations lie on another mirror plane. Application of the mirror symmetry generates octa­hedral coordination around the Sn atom. All compounds exhibit bifurcated and simple hydrogen-bonding inter­actions between the ammonium groups and the Cl atoms, with little variation in the hydrogen-bonding geometries.

Bis(1-phenyl­ethyl­ammonium) hexa­chloridostannate(IV) and bis­(2-phenyl­ethyl­ammonium) hexa­chloridostannate(IV)

The crystal structures of the two isomers bis­(1-phenyl­ethyl­ammonium) hexa­chloridostannate(IV) and bis­(2-phenyl­ethyl­ammonium) hexa­chloridostannate(IV), both (C₈H₁₂N)₂[SnCl₆], exhibit alternating organic and inorganic layers, which inter­act via N—H...Cl hydrogen bonding. The inorganic layer contains an extended two-dimensional hydrogen-bonded sheet. The Sn atom in the 1-phenylethyl­ammonium salt lies on an inversion centre.

Bis(4-amino­pyridinium) hexa­chlorido­stannate(IV) and bis­(p-toluidinium) hexa­chloridostannate(IV)

The crystal structures of the two organic-inorganic hybrids bis­(4-amino­pyridinium) hexa­chloridostannate(IV), (C₅H₇N₂)₂[SnCl₆], and bis­(p-toluidinium) hexa­chlorido­stannate(IV), (C₇H₁₀N)₂[SnCl₆], differ in the way their cations pack in the layered structures. The Sn atom in the 4-amino­pyridinium compound lies on an inversion centre.