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 (H 2 OI + ) 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/H 2 OI + 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 pK a of HOI and H 2 OI + .