peroksaattiionin

Peroksaattiionin, chemical formula O2^2-, is a diatomic anion consisting of two oxygen atoms linked by a single covalent bond. It is characterized by a bond order of one and a relatively weak oxygen-oxygen bond. The ion carries a charge of -2, with each oxygen atom having a formal oxidation state of -1. This species is also known as the peroxide ion.

Peroksaattiionin is a fundamental component of many inorganic peroxides, such as sodium peroxide (Na2O2) and barium peroxide (BaO2). In these compounds, the peroksaattiionin acts as the anion, balancing the positive charge of the metal cation. The O-O bond length in the peroksaattiionin is typically around 149 picometers. The ion is diamagnetic, meaning it does not possess any unpaired electrons.

The reactivity of the peroksaattiionin is largely due to the weak O-O bond, making it susceptible to decomposition. It is a strong oxidizing agent, capable of reacting with various substances. In aqueous solutions, the peroksaattiionin can react with water, though it is generally more stable in solid peroxide compounds. Its formation and reactions are important in various chemical processes, including oxidation reactions and the chemistry of oxygen-containing compounds.