hexaaquaindiumIII

Hexaaquaindium(III) is an inorganic coordination complex with the chemical formula [In(H2O)6]3+. It consists of a central indium(III) ion coordinated to six water molecules. This complex is a hydrated form of indium(III) and is often encountered in aqueous solutions of indium salts. The indium ion in this complex is in its +3 oxidation state.

In aqueous solution, indium(III) ions exist predominantly as the hexaaquaindium(III) cation. The water ligands are held to the indium ion by coordinate covalent bonds. The structure is octahedral, with the six water molecules arranged around the central indium ion. The positive charge of +3 is distributed across the entire complex cation.

Hexaaquaindium(III) is soluble in water and its solutions are typically acidic due to hydrolysis, where water molecules coordinated to the indium ion can release protons. The acidity is a characteristic property of many hydrated metal ions with high charge density. This complex is an important species in understanding the chemistry of indium in aqueous environments and is relevant in various chemical processes involving indium, such as its extraction and purification. It serves as a precursor for the synthesis of other indium compounds.