Hypervalent organoiodine compounds

Unlike its lighter congeners, the halogen iodine forms a number of stable organic compounds, in which iodine exhibits higher formal oxidation states than −1 or coordination number exceeding 1. These are loosely termed the hypervalent organoiodines (strictly, this requires an electron count exceeding 8 around iodine and the presence of a carbon–iodine covalent bond).