An IrIV-containing polyoxometalate

Abstract

[HIr^IVW₆O₂₄]⁷⁻, representing the first Ir-containing Anderson–Evans-type polyanion and the first structurally characterized Ir^IV-based polyoxometalate, has been isolated as its hydrated sodium salt and characterized by single-crystal X-ray diffraction, mass spectrometry, and IR, UV-Vis and EPR spectroscopy. Cyclic voltammetry indicates that the Ir^IV ions in [HIrW₆O₂₄]⁷⁻ can undergo reversible one-electron reduction and oxidation, resulting in Ir^III and Ir^V derivatives.