fbpx
Wikipedia

Technetium(VII) oxide

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 Tc−O−Tc angle is 180°.[2]

Technetium(VII) oxide

Structural formula of technetium(VII) oxide.

Unit cell of technetium(VII) oxide.
Names
IUPAC name
Technetium(VII) oxide
Other names
Technetium heptoxide
Identifiers
  • 12165-21-8 N
3D model (JSmol)
  • Interactive image
  • 22227441
  • DTXSID70153330
  • InChI=1S/7O.2Tc/q7*-2;2*+7
  • [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Tc+7].[Tc+7]
Properties
Tc2O7
Molar mass 307.810 g/mol
Appearance light yellow solid
Density 3.5 g/cm3
Melting point 119.5 °C (247.1 °F; 392.6 K)
Boiling point 310.6 °C (591.1 °F; 583.8 K)
hydrolysis to HTcO4
−40.0·10−6 cm3/mol
Structure[1]
Primitive orthorhombic
Pbca, No. 61
a = 1375.6 pm, b = 743.9 pm, c = 561.7 pm[1]
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 [77 °F], 100 kPa).
N verify (what is YN ?)

Technetium(VII) oxide is prepared by the oxidation of technetium at 450–500 °C:[3]

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

  1. ^ a b Krebs, Bernt (1971). "Technetium(VII)-oxid: Ein Übergangsmetalloxid mit Molekülstruktur im festen Zustand". Zeitschrift für anorganische und allgemeine Chemie. 380 (2): 146–159. doi:10.1002/zaac.19713800205.
  2. ^ Krebs, Bernt (1969). "Technetium(VII)-oxid: Ein Übergangsmetalloxid mit Molekülstruktur im festen Zustand". Angewandte Chemie. 81 (9): 328–329. Bibcode:1969AngCh..81..328K. doi:10.1002/ange.19690810905.
  3. ^ Herrell, A. Y.; Busey, R. H.; Gayer, K. H. (1977). Technetium(VII) Oxide, in Inorganic Syntheses. Vol. XVII. pp. 155–158. doi:10.1002/9780470132487.ch41. ISBN 0-07-044327-0.

technetium, oxide, chemical, compound, with, formula, tc2o7, this, yellow, volatile, solid, rare, example, molecular, binary, metal, oxide, other, examples, being, ruo4, oso4, unstable, mn2o7, adopts, centrosymmetric, corner, shared, tetrahedral, structure, wh. 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 Tc O Tc angle is 180 2 Technetium VII oxide Structural formula of technetium VII oxide Unit cell of technetium VII oxide NamesIUPAC name Technetium VII oxideOther names Technetium heptoxideIdentifiersCAS Number 12165 21 8 N3D model JSmol Interactive imagePubChem CID 22227441CompTox Dashboard EPA DTXSID70153330InChI InChI 1S 7O 2Tc q7 2 2 7SMILES O 2 O 2 O 2 O 2 O 2 O 2 O 2 Tc 7 Tc 7 PropertiesChemical formula Tc2O7Molar mass 307 810 g molAppearance light yellow solidDensity 3 5 g cm3Melting point 119 5 C 247 1 F 392 6 K Boiling point 310 6 C 591 1 F 583 8 K Solubility in water hydrolysis to HTcO4Magnetic susceptibility x 40 0 10 6 cm3 molStructure 1 Crystal structure Primitive orthorhombicSpace group Pbca No 61Lattice constant a 1375 6 pm b 743 9 pm c 561 7 pm 1 HazardsOccupational safety and health OHS OSH Main hazards radioactiveExcept where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa N verify what is Y N Infobox references Technetium VII oxide is prepared by the oxidation of technetium at 450 500 C 3 4 Tc 7 O2 2 Tc2O7It is the anhydride of pertechnetic acid and the precursor to sodium pertechnetate Tc2O7 2 H2O 2 HTcO4 Tc2O7 2 NaOH 2 NaTcO4 H2OReferences Edit a b Krebs Bernt 1971 Technetium VII oxid Ein Ubergangsmetalloxid mit Molekulstruktur im festen Zustand Zeitschrift fur anorganische und allgemeine Chemie 380 2 146 159 doi 10 1002 zaac 19713800205 Krebs Bernt 1969 Technetium VII oxid Ein Ubergangsmetalloxid mit Molekulstruktur im festen Zustand Angewandte Chemie 81 9 328 329 Bibcode 1969AngCh 81 328K doi 10 1002 ange 19690810905 Herrell A Y Busey R H Gayer K H 1977 Technetium VII Oxide in Inorganic Syntheses Vol XVII pp 155 158 doi 10 1002 9780470132487 ch41 ISBN 0 07 044327 0 Retrieved from https en wikipedia org w index php title Technetium VII oxide amp oldid 1097167613, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.