Concept

Olation

Summary
In inorganic chemistry, olation is the process by which metal ions form polymeric oxides in aqueous solution. The phenomenon is important for understanding the relationship between metal aquo complexes and metal oxides, which are represented by many minerals. At low pH, many metal ions exist in aqueous solution as aqua coordination complexes, often with the formula [M(H2O)6]3+. As the pH increases, one O-H bond ionizes to give the hydroxide complex, the conjugate base of the parent hexaaqua complex: :[M(H2O)6]3+ [M(H2O)5OH]2+ + H+ The hydroxo complex is poised to undergo olation, which is initiated by displacement of one water by a neighboring complex: :[M(H2O)5OH]2+ + [M(H2O)6]3+ M(H2O)5(μ-OH)M(H2O)5}5+ + H2O In this product, the hydroxide ligand bridges between the two metals, this bridge is denoted with the symbol μ. In the resulting 5+ ion, the remaining water and hydroxo ligands are highly acidic and the ionization and condensation processes can continue at still higher p
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