Technetium(VII) oxide

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IUPACName = Technetium(VII) oxide
OtherNames = Technetium heptoxide
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Formula = Tc₂O₇
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Appearance = yellow solid
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MeltingPt = 119.5 °C
BoilingPt = 310.6 °C
Solubility = hydrolysis to HTcO₄
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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 bi-tetrahedral structure in which the terminal and bridging Tc-O bonds are 167pm and 184 pm respectively and the O-Tc-O angle is 180° [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]

Technetium(VII) oxide is prepared by the oxidation of technetium at 450-500 °C: [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.] :2 Tc + 3.5 O₂ → Tc₂O₇It is the anhydride of pertechnic acid and the precursor to sodium pertechnetate::Tc₂O₇ + 2 NaOH → 2 NaTcO₄ + H₂O

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