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Technetium(VII) oxide

Technetium(VII) oxide

IUPAC name	Technetium(VII) oxide
Other names	Technetium heptoxide
Properties
Molecular formula	Tc₂O₇
Appearance	yellow solid
Melting point	119.5 °C
Boiling point	310.6 °C
Solubility in water	hydrolysis to HTcO₄
Hazards
Main hazards	radioactive
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Technetium(VII) oxide is the chemical compound with the formula Tc₂O₇. This yellow volatile solid is a rare example of a molecular binary metal oxide, the other examples being RuO₄, OsO₄, and the unstable Mn₂O₇. It adopts a centrosymmetric corner-shared bitetrahedral structure.^[1]

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Technetium(VII) oxide is prepared by the oxidation of technetium at 450-500 °C:^[2]

2 Tc + 3.5 O₂ → Tc₂O₇

It is the anhydride of pertechnic acid and the precursor to sodium pertechnetate:

Tc₂O₇ + 2 NaOH → 2 NaTcO₄ + H₂O

References

^ Krebs, B. Technetium(VII)-oxid: Ein Übergangsmetalloxid mit Molekülstruktur im festen Zustand" Angewandte Chemie 1969, Volume 81, pp. 328 - 329. DOI 10.1002/ange.19690810905
^ Herrell, A. Y.; Busey, R. H.; Gayer, K. H. "Technetium(VII) Oxide" Inorganic Syntheses, 1977, volume XVII, p. 155-158. ISBN 0-07-044327-0.

Categories: Technetium compounds | Oxides