Iodine chemistry in the +1 oxidation state. I. The electronic spectra of OI−, HOI, and H2OI+

Abstract

Electronic spectra are reported for the hypoiodite ion (OI−), hypoiodous acid (HOI), and its conjugate acid (H2OI+) in aqueous media. Iodine in the +1 oxidation state was produced by either of the two rapid reactions[Formula: see text]or[Formula: see text]Spectroscopic evidence of the disproportionation of OI−/HOI/H2OI+ to iodide and iodate in basic media, and to iodine and iodate in acid media, was obtained. The results are consistent with previously reported values for the pKa of HOI and H2OI+.