Abstract
A novel aquachloridooxidodiperoxidomolybdate(VI), [MoClO(O2)2(OH2)]−, was crystallised as tetraethylammonium and triethylmethylammonium salts from strongly acidic aqueous solutions, and was structurally analysed by single crystal X-ray diffraction and NMR spectroscopy. The aqueous behaviour of the present anion observed by 17O NMR agrees with that reported in a previous speciation study.