Synthesis and characterization of amantadinium iodoacetatobismuthate, a hybrid compound with mixed iodide–carboxylate anions

The amantadinium iodoacetatobismuthate(III) [C₁₀H₁₅NH₃·(CH₃)₂CO]₂[BiI_3.67(CH₃COO)_1.33] is a new hybrid halometallate with iodide ions partially replaced by oxygen-containing acetates to form stronger interaction between the anionic and cationic substructures. The title compound as well-shaped orange-red crystals was synthesized by a facile reaction in acetone solution in the presence of glacial acetic acid. The crystal structure of the compound consists of the infinite anionic chains [BiI_3.67(CH₃COO)_1.33]^2– and the countercations [C₁₀H₁₅NH₃·(CH₃)₂CO]+; according to the optical absorption data, the test compound is a semiconductor with a band gap of 2.06 eV.