Coordination and hydrogen bonding diversity of OOH ligand in crystalline organoelement and inorganic hydroperoxides

Hydroperoxo complexes, that is coordination compounds with directly bound hydroperoxo ligands OOH⁻, are encountered and applied in various fields such as catalytic oxygenations and functional material precursors. This focus article spotlights a hydroperoxo ligand as a key moiety providing the reactivity of these complexes and stabilization of their crystal structures through hydrogen bonding. The diversity of hydroperoxo coordination types and hydrogen-bonded motifs is demonstrated for the crystalline organoelement and inorganic hydroperoxides presented in the structural databases.