Crystal structure of fluorosulfate complex compounds of indium(III) M2[InF3(SO4)H2O] (M = K, NH4)

Abstract

The crystal structures of isostructural mixed-ligand fluorosulfate complex compounds of indium(III) M₂[InF₃(SO₄)H₂O] (M = K, NH₄), formed of K⁺ cations, NH₄⁺ respectively, and complex [InF₃(SO₄)H₂O]^2– anions are determined. In the complex anion, the indium atom surrounded by three F atoms, the oxygen atom of the coordinated H₂O molecule, and two oxygen atoms of the bridging sulfate group forms a slightly distorted octahedron (CN 6). Via alternating bridging SO₄ groups, the polyhedra of In(III) atoms are arranged in polymer chains. The O–H•••F hydrogen bonds organize the chains in a three-dimensional network. The K⁺ and NH₄⁺ cations are located in the structure framework and additionally strengthen it.