Iodite Explained

The iodite ion, or iodine dioxide anion, is the halite with the chemical formula . Within the ion the Iodine exists in the oxidation state of +3.

Iodite anion

Iodites (including iodous acid) are highly unstable and have been observed but never isolated. They will rapidly disproportionate to molecular Iodine and Iodates. However, they have been detected as intermediates in the conversion between iodide and iodate.^{[1] [2]}

Iodous acid

Iodous acid is acid form of the iodite ion, with the formula HIO₂.

Other oxyanions

Iodine can assume oxidation states of −1, +1, +3, +5, or +7. A number of neutral iodine oxides are also known.

Iodine oxidation state	−1	+1	+3	+5	+7
Name	Iodide	Hypoiodite	Iodite	Iodate	periodate
Formula	I^−	IO^−			or

Notes and References

1. Gupta. Yugul Kishore. Sharma. Devendra Nath. Kinetics and mechanism of the reduction of iodate to iodite by bromide in the presence of phenol. The Journal of Physical Chemistry. August 1971. 75. 16. 2516–2522. 10.1021/j100685a018.
2. Gilles. Mary K.. Polak. Mark L.. Lineberger. W. Carl Lineberger. W. C.. Photoelectron spectroscopy of the halogen oxide anions FO−, ClO−, BrO−, IO−, OClO−, and OIO−. The Journal of Chemical Physics. 1992. 96. 11. 8012. 10.1063/1.462352. 1992JChPh..96.8012G.