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Technetium(VII) oxide is the ] with the ] Tc<sub>2</sub>O<sub>7</sub>. This yellow volatile solid is a rare example of a molecular binary metal oxide, the other examples being RuO<sub>4</sub>, ], and the unstable ]. 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°<ref>{{cite journal| author = Krebs, B. | title = Technetium(VII)-oxid: Ein Übergangsmetalloxid mit Molekülstruktur im festen Zustand| journal = Angewandte Chemie | year = 1969 | volume = 81| pages = 328–329| doi = 10.1002/ange.19690810905}}</ref> Technetium(VII) oxide is the ] with the ] Tc<sub>2</sub>O<sub>7</sub>. This yellow volatile solid is a rare example of a molecular binary metal oxide, the other examples being RuO<sub>4</sub>, ], and the unstable ]. 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°<ref>{{cite journal| author = Krebs, B. | title = Technetium(VII)-oxid: Ein Übergangsmetalloxid mit Molekülstruktur im festen Zustand| journal = Angewandte Chemie | year = 1969 | volume = 81| issue = 9| pages = 328–329| doi = 10.1002/ange.19690810905}}</ref>


Technetium(VII) oxide is prepared by the oxidation of ] at 450-500 °C:<ref>{{cite book| author = Herrell, A. Y.; Busey, R. H.; Gayer, K. H. | title = Technetium(VII) Oxide, in Inorganic Syntheses| year = 1977 | volume = XVII| pages = 155–158 | isbn = 0-07-044327-0}}</ref> Technetium(VII) oxide is prepared by the oxidation of ] at 450-500 °C:<ref>{{cite book| author = Herrell, A. Y.; Busey, R. H.; Gayer, K. H. | title = Technetium(VII) Oxide, in Inorganic Syntheses| year = 1977 | volume = XVII| pages = 155–158 | isbn = 0-07-044327-0}}</ref>

Revision as of 19:22, 9 March 2011

Technetium(VII) oxide
Names
IUPAC name Technetium(VII) oxide
Other names Technetium heptoxide
Identifiers
CompTox Dashboard (EPA)
Properties
Chemical formula Tc2O7
Appearance yellow solid
Melting point 119.5 °C
Boiling point 310.6 °C
Solubility in water hydrolysis to HTcO4
Hazards
Occupational safety and health (OHS/OSH):
Main hazards radioactive
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

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°

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

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

  1. Krebs, B. (1969). "Technetium(VII)-oxid: Ein Übergangsmetalloxid mit Molekülstruktur im festen Zustand". Angewandte Chemie. 81 (9): 328–329. doi:10.1002/ange.19690810905.
  2. Herrell, A. Y.; Busey, R. H.; Gayer, K. H. (1977). Technetium(VII) Oxide, in Inorganic Syntheses. Vol. XVII. pp. 155–158. ISBN 0-07-044327-0.{{cite book}}: CS1 maint: multiple names: authors list (link)
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