Technetium(VII) oxide is the

chemical compound A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element ...

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 In crystallography, a centrosymmetric point group contains an inversion center as one of its symmetry elements. In such a point group, for every point (x, y, z) in the unit cell there is an indistinguishable point (-x, -y, -z). Such point g ...

corner-shared bi-tetrahedral structure in which the terminal and bridging Tc−O bonds are 167pm and 184 pm respectively and the Tc−O−Tc angle is 180°. Technetium(VII) oxide is prepared by the oxidation of

technetium Technetium is a chemical element with the symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive. All available technetium is produced as a synthetic element. Naturally occurring technetium is a spontaneous ...

at 450–500 °C: :4 Tc + 7 O₂ → 2 Tc₂O₇ It is the anhydride of pertechnetic acid and the precursor to sodium pertechnetate: :Tc₂O₇ + 2 H₂O → 2 HTcO₄ :Tc₂O₇ + 2 NaOH → 2 NaTcO₄ + H₂O

References

{{Oxides Technetium compounds Transition metal oxides Acidic oxides