Rubidium peroxide

Rubidium peroxide

Names
IUPAC name Rubidium peroxide
Identifiers
CAS Number	23611-30-5
3D model (JSmol)	Interactive image
ChemSpider	10737150
ECHA InfoCard
E number
CompTox Dashboard (EPA)	{{#property:P3117}}
InChI InChI=1S/O2.2Rb/c1-2;;/q-2;2*+1 Key: ZMNCGAAXQANUDM-UHFFFAOYSA-N
SMILES [Rb+].[Rb+].[O-][O-]
Properties
Chemical formula	O2Rb2
Molar mass	202.934 g·mol−1
Appearance	colourless solid
Density	3.80 g·cm−3
Melting point	570 °C
Solubility in water	reacts
Related compounds
Other anions	Rubidium oxide Rubidium superoxide
Other cations	Lithium peroxide Sodium peroxide Potassium peroxide Caesium peroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Rubidium peroxide is rubidium's peroxide with the chemical formula Rb₂O₂.

Production

Rubidium peroxide can be produced by rapidly oxidizing rubidium in liquid ammonia at −50°C.

$\mathrm{2}\mathrm{R}\mathrm{b}\mathrm{+}{\mathrm{O}}_{\mathrm{2}}\stackrel{-50{}^{\circ }\text{C}}{\to }\mathrm{R}{\mathrm{b}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{2}}$

It can also be produced by pyrolysis of rubidium superoxide in vacuum.

$\mathrm{2}\mathrm{R}\mathrm{b}{\mathrm{O}}_{\mathrm{2}}\stackrel{290{}^{\circ }\text{C}}{\to }\mathrm{R}{\mathrm{b}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{2}}\mathrm{+}{\mathrm{O}}_{\mathrm{2}}$

Properties

Rubidium peroxide is a colourless to light yellow solid with the orthorhombic crystal structure.