Kalpana Kalpana (Editor)

Rhenium(IV) oxide

Updated on
Edit
Like
Comment
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Formula
  
ReO2

Density
  
11.4 g/cm³

Molar mass
  
218.206 g/mol

Pubchem
  
82847

Rhenium(IV) oxide

Appearance
  
gray orthorhombic crystals

Rhenium(IV) oxide or rhenium dioxide is the inorganic compound with the formula ReO2. This gray to black crystalline solid is a laboratory reagent that can be used as a catalyst. It adopts the rutile structure.

Synthesis and reactions

It forms via comproportionation:

2 Re2O7 + 3 Re → 7 ReO2

At high temperatures it undergoes disproportionation:

7 ReO2 → 2 Re2O7 + 3 Re

It forms perrhenates with alkaline hydrogen peroxide and oxidizing acids. In molten sodium hydroxide it forms sodium rhenate:

2 NaOH + ReO2 → Na2ReO3 + H2O

References

Rhenium(IV) oxide Wikipedia
(Text) CC BY-SA