Dioxigenyl Salts

Dioxigenyl salts (dioxygenyl compounds) are salts of the oxygen cation O ₂ ⁺ .

Content

Getting

The first compound of this type was obtained in 1962 by the reaction of oxygen with platinum hexafluoride :

{\mathsf {O_{2}+PtF_{6}\rightarrow O_{2}^{+}PtF_{6}^{-}}}

{\ displaystyle {\ mathsf {O_ {2} + PtF_ {6} \ rightarrow O_ {2} ^ {+} PtF_ {6} ^ {-}}}}

Common production methods are the reaction of dioxidifluoride with fluorides of elements or a physical effect that activates a mixture of metal fluoride, fluoride and oxygen (UV irradiation, electric discharge, pressure with heating).

Building

The OO bond length in the cation (0.1123 nm) is shorter than that of an oxygen molecule. The cation contains one unpaired electron; therefore, all salts are paramagnetic. To stabilize the salt, the anion must be stable and resistant to oxidation. Salts with anions MF ₆ ^{- are} known (where M = Au, Pt, Ru, Rh, Sb, As, P), BF ₄ ^- , MF ₆ ^2- (where M = Mn, Ni, Pd).

Physical and chemical properties

When heated, decompose to oxygen, fluoride and metal fluoride. They are strong fluorooxidants. With organic matter they react with explosion and ignition. Can oxidize xenon at room temperature.

{\mathsf {O_{2}PtF_{6}+Xe\rightarrow XePtF_{6}+O_{2}\uparrow }}

{\ displaystyle {\ mathsf {O_ {2} PtF_ {6} + Xe \ rightarrow XePtF_ {6} + O_ {2} \ uparrow}}}

Dioxigenyl fluoride (O ₂ F) reacts with xenon acid (H ₂ XeO ₅ ) with an explosion:

{\mathsf {2O_{2}F+H_{2}XeO_{5}\rightarrow XeF_{2}+H_{2}O+4O_{2}\uparrow }}

{\ displaystyle {\ mathsf {2O_ {2} F + H_ {2} XeO_ {5} \ rightarrow XeF_ {2} + H_ {2} O + 4O_ {2} \ uparrow}}}

It has a dimer O ₄ F ₂ , characterized by less pronounced properties and less stability

Literature

Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1990. - T. 2 (Daf-Med). - 671 p. - ISBN 5-82270-035-5 .