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Rhenium(IV) oxide

Chemical compound From Wikipedia, the free encyclopedia

Rhenium(IV) oxide
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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.

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Synthesis and reactions

It forms via comproportionation:[3]

2 Re2O7 + 3 Re → 7 ReO2

Single crystals are obtained by chemical transport, using iodine as the transporting agent.:[4]

ReO2 + I2 ReO2I2

At high temperatures it undergoes disproportionation:

7 ReO2 → 2 Re2O7 + 3 Re

It forms rhenates with alkaline hydrogen peroxide and oxidizing acids.[5] In molten sodium hydroxide it forms sodium rhenate:[6]

2 NaOH + ReO2 → Na2ReO3 + H2O
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References

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