Oxocations

An oxocation is a positively charged molecular ion in which an oxygen atom bears the positive charge. These species are often intermediates in chemical reactions and are characterized by their high reactivity. The positive charge on the oxygen atom makes it a strong electrophile, readily attacking electron-rich centers. Oxocations can be formed through various mechanisms, including protonation of oxygen, loss of an electron from a neutral oxygen-containing molecule, or through fragmentation processes. Their transient nature means they are typically observed and studied using techniques like mass spectrometry or by trapping them in matrices. Understanding oxocations is crucial for elucidating reaction mechanisms in organic and inorganic chemistry, particularly in areas involving oxidation, combustion, and atmospheric chemistry. Examples include the protonated carbonyl group [R2C=OH]+ or radical cations formed by electron ionization.