perrhenic acid

Perrhenic acid is also used in the manufacture of x-ray targets.

Perrhenic acid catalyses the dehydration of oximes to nitriles.

Perrhenic acid is the chemical compound with the formula ReO(OH).

Rhenium can be dissolved in nitric or concentrated sulfuric acid to produce perrhenic acid.

Gaseous perrhenic acid is tetrahedral, as suggested by its formula HReO.

Perrhenic acid combined with platinum on a support gives rise to a useful hydrogenation and hydrocracking catalyst for the petroleum industry.

Perrhenic acid, ReO2HO, is closely related to ReO, however.

Perrhenate, like its conjugate acid perrhenic acid, features rhenium in the oxidation state of +7 with a d configuration.

In combination with tertiary arsines, perrhenic acid gives a catalyst for the epoxidation of alkenes with hydrogen peroxide.

Perrhenic acid or the related anhydrous oxide ReO converts to dirhenium heptasulfide upon treatment with hydrogen sulfide:

These salts are prepared by oxidation of rhenium compounds with nitric acid followed by neutralization of the resulting perrhenic acid.

Ammonium perrhenate (APR) is the ammonium salt of perrhenic acid, NHReO.

Perrhenic acid is a precursor to a variety of homogeneous catalysts, some of which are promising in niche applications that can justify the high cost of rhenium.

The structure of solid perrhenic acid is [ORe-O-ReO(HO)].

HO are formed, which contain tetrahedral ReO For most purposes, perrhenic acid and rhenium(VII) oxide are used interchangeably.

Its products molybdenum oxide, ferro molybdenum, molybdenum salts, metallic molybdenum dioxide, molybdenum, rhenium metal, ammonium perrhenate and perrhenic acid, among other.

ReOCl(PPh) is commercially available, but it is readily synthesized by reaction of perrhenic acid with triphenylphosphine in a mixture of hydrochloric acid and acetic acid.

Conventionally, perrhenic acid is considered to have the formula HReO, and a species of this formula forms when rhenium(VII) oxide sublimes in the presence of water or steam.

Perrhenic acid in the presence of HCl undergoes reduction in the presence of thioethers and tertiary phosphines to give Re(V) complexes with the formula ReOClL.

For example, silica impregnated with a solution of perrhenic acid is reduced with hydrogen at 500 C. This catalyst is used in the dehydrogenation of alcohols and also promotes the decomposition of ammonia.

Rhenium(VII) oxide and perrhenic acid readily dissolve in water; they are leached from flue dusts and gasses and extracted by precipitating with potassium or ammonium chloride as the perrhenate salts, and purified by recrystallization.