Stabilization of [BiCl6]3− and [Bi2Cl10]4− with various organic precursors as cations leading to inorganic–organic supramolecular adducts: Syntheses, crystal structures and properties of [C5H7N2]3[BiCl6], [C5H7N2][C5H8N2][BiCl6] and [C10H10N2]2[Bi2Cl10]

Syntheses, crystal structures and properties of three ion pair compounds [C5H7N2]3[BiCl6] (1), [C5H7N2][C5H8N2][BiCl6] (2) and [C10H10N2]2[Bi2Cl10] (3) have been described. Compounds 1 and 2 crystallize in triclinic system (space group, P-1), whereas compound 3 crystallizes in monoclinic sysyem (space group, P21/c). In their crystal structures, supramolecular hydrogen bonding interactions between bismuth-chloro anion and organic cation play an important role in the stabilization of [BiCl6]3− and [Bi2Cl10]4− anions in the title ion pair compounds. Compounds 1, 2 and 3 are characterized by routine spectral analyses and elemental analyses, besides crystal structure determinations. Compounds 1, 2 and 3 are additionally characterized by thermogravimetric analyses. Compound [C5H7N2][C5H8N2][BiCl6] (2) exhibits emission spectrum at room temperature in the visible region.

Graphical abstractInorganic–organic hybrid ion pair compounds [C5H7N2]3[BiCl6] (1), [C5H7N2][C5H8N2][BiCl6] (2) and [C10H10N2]2[Bi2Cl10] (3) are isolated in respective one-pot syntheses and are characterized by single crystal X-ray crystallography. Compound [C5H7N2][C5H8N2][BiCl6] (2) exhibits the emission behavior at room temperature in the visible region.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► This article has described synthesis and structural characterization of three ion pair compounds based on halogenobismuthate(III) anions and protonated organic cations. ► Supramolecular hydrogen bonding interactions play an important role in the stabilization of title chloro-bismuth(III) anions. ► One of the title compounds exhibit emission in the visible region at room temperature.