Rhenium(VII) oxide

Rhenium(VII) oxide

Chembox new
Name = Rhenium(VII) oxide
ImageFile =
ImageName = Rhenium(VII) oxide
OtherNames = Rhenium heptoxide
Name = Related
Section1 = Chembox Identifiers
CASNo = 1314-68-7

Section2 = Chembox Properties
Formula = O7Re2
MolarMass = 484.410 g/mol
Appearance = yellow crystalline powder
Density = 6.103 g/cm3, solid
MeltingPt = 360 °C
BoilingPt = sublimes

Section7 = Chembox Hazards
EUClass = not listed

Section8 = Chembox Other
OtherCpds = Manganese(VII) oxide; technetium(VII) oxide; perrhenic acid

Rhenium(VII) oxide is the chemical compound with the formula Re2O7. It is the anhydride of the hypothetical acid (HOReO3). Perrhenic acid, Re2O7·2H2O, however is closely related structurally to Re2O7. Solid Re2O7 is polymeric consisting, unusually, of the metal centers in two coordination environments - octahedral and tetrahedral. Gaseous Re2O7 is however molecular, consisting of a pair of ReO4 tetrahedra that share a corner. [Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.]

Re2O7 is a precursor to methyl rhenium trioxide ("MTO"), a catalyst for oxidations. [cite journal | author = W. A. Herrmann and F. E. Kuhn | title = Organorhenium Oxides | year = 1997 | journal = Acc. Chem. Res. | volume = 30 | issue = 4 | pages = 169–180 | doi=10.1021/ar9601398]

References


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