摘要: Tri- and pentavalent iodine compounds are called λ3- λ5-iodanes. Ligand exchange, i.e. displacement of heteroatom ligands λ5-iodanes with external nucleophiles, is a facile low energy process. A very high leaving group ability λ3-iodanyl groups among the most important features λ3-iodanes, which makes it possible to generates highly reactive species such as carbenes, nitrenes, cations, arynes under mild conditions oxidize wide range functionalities alcohols, amines, sulfides, alkenes, alkynes, carbonyl compounds. The process termed reductive elimination, in eliminates energetically preferable reduction univalent iodides. also associates an increase entropy. Pseudorotation ligand coupling on iodine(III), homolytic cleavage hypervalent iodanes discussed. Finally, recent progress structural elucidations λ3-iodanes shown here.
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