21294-41-7

Basic information

• Product Name: dioxouranium(V)
• Synonyms: dioxouranium(V)
• CAS NO: 21294-41-7
• Molecular Weight: 270.028
• Mol File: 21294-41-7.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: dioxouranium(V)(CAS DataBase Reference)
• NIST Chemistry Reference: dioxouranium(V)(21294-41-7)
• EPA Substance Registry System: dioxouranium(V)(21294-41-7)

Safety Data

• Hazardous Substances Data: 21294-41-7(Hazardous Substances Data)

Upstream product

• 41618-67-1 U(OH)⁽³⁺⁾ 
• 7732-18-5 water 
• 80937-33-3 oxygen 

Downstream Products

• 17632-84-7 Cr(II)(2,2'-bipyridine)3 
• 16637-16-4 uranyl ion 
• 16089-60-4 uranium⁽⁴⁺⁾ 
• 7722-84-1 dihydrogen peroxide 
• 7782-44-7 hydroperoxyl radical 

Relevant articles and documents

Uranyl-catalyzed chemiluminescent reaction of U4+ oxidation by dioxygen in aqueous HClO4 solution

Chemiluminescence (CL) accompanying the reaction of U4+ with O2 in 0.0004-0.1 M HClO4 was studied. It was found that the electron-excited uranyl ion (UO22+)* is the CL emitter. The fact that the reaction rate and the CL yield increase as the solution acidity decreases was explained by different reactivities of the U4+aq aquaion and the products of its stepwise hydrolysis, UOH3+ and U(OH)22+, toward O2. Based on the results of analysis of the chain-radical mechanism of the reaction between U4+ and O2, it was concluded that transfer of an electron from the UO2+ ion to the oxidizing agent (a OH radical) is the most plausible elementary step of the reaction of (UO22+)* formation. It was found that the reaction rate, as well as the CL yield, increase substantially in the presence of uranyl ion. Catalytic action of UO22+ was explained by the formation of a UO22+ · UO2+ complex, which reduces the rate of the UO2+ disproportionation reaction (UO2+ is an intermediate of the reaction and is involved in chain propagation), and by regeneration of the active center, UO2+, in the reaction of UO22+ with U4+.