Perrhenic acid

Short description: Chemical compound

Perrhenic acid

Monohydrate

|  |

|

Names
IUPAC name

Perrhenic acid

Systematic IUPAC name

[Diaquatrioxidorhenium(VII)]-μ-oxido-[trioxidorhenium(VII)]

Other names

Hydrated rhenium(VII) oxide

Identifiers

CAS Number

* 13768-11-1 N

3D model (JSmol)

* Interactive image

ChemSpider |

* 21106462 Y

EC Number |

* 237-380-4

PubChem CID

* 83718

RTECS number |

* TT4550000

InChI

* InChI=1S/2H2O.7O.2Re/h2*1H2;;;;;;;;; Y

Key: JOTGKJVGIIKFIQ-UHFFFAOYSA-N Y

* InChI=1/2H2O.7O.2Re/h2*1H2;;;;;;;;;/rH4O9Re2/c1-10(2,3)9-11(4,5,6,7)8/h4-5H2

Key: JOTGKJVGIIKFIQ-SEUCOXMMAB

SMILES

* [OH2+][Re-2](=O)(=O)(=O)([OH2+])O[Re](=O)(=O)=O

Properties

Chemical formula

| H
4Re

9 (solid)
HReO
4 (gas)
Molar mass | 251.2055 g/mol
Appearance  | Pale yellow solid
Boiling point | sublimes

Solubility in water

| Soluble
Acidity (pKa)  | −1.25[1]
Conjugate base | Perrhenate
Structure

Coordination geometry

| octahedral-tetrahedral (solid)
tetrahedral (gas)
Hazards
Main hazards | Corrosive
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H302, H314, H332

GHS precautionary statements

| P260, P261, P264, P270, P271, P280, P301+312, P301+330+331, P303+361+353, P304+312, P304+340, P305+351+338, P310, P312, P321, P330, P363, P405, P501
NFPA 704 (fire diamond)  |

Flash point | Non-flammable
Related compounds

Related compounds

* Perrhenate
* Manganese(VII) oxide
* Technetium(VII) oxide
* Rhenium(VII) oxide
* Permanganic acid
* Pertechnetic acid
* Perchloric acid

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 ?)
Infobox references

Tracking categories (test):

* SizeSet

Perrhenic acid is the chemical compound with the formula Re

7(H
2O)
2. It is obtained by evaporating aqueous solutions of Re

7. Conventionally, perrhenic acid is considered to have the formula HReO
4, and a species of this formula forms when rhenium(VII) oxide sublimes in the presence of water or steam.[2] When a solution of Re

7 is kept for a period of months, it breaks down and crystals of HReO
4 * H2O are formed, which contain tetrahedral ReO−
4.[3] For most purposes, perrhenic acid and rhenium(VII) oxide are used interchangeably. Rhenium can be dissolved in nitric or concentrated sulfuric acid to produce perrhenic acid.

## Contents

* 1 Properties
* 2 Reactions
* 2.1 Catalysis
* 3 Other uses
* 4 See also
* 5 References

## Properties

The structure of solid perrhenic acid is [O
3Re–O–ReO
3(H
2O)
2].[4] This species is a rare example of a metal oxide coordinated to water; most often metal–oxo–aquo species are unstable with respect to their corresponding hydroxides:

M(O)(H
2O) → M(OH)

The two rhenium atoms have different bonding geometries, with one being tetrahedral and the other octahedral, and with the water ligands coordinated to the latter.

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

## Reactions

Perrhenic acid or the related anhydrous oxide Re

7 converts to dirhenium heptasulfide upon treatment with hydrogen sulfide:

7 \+ 7 H
2S → Re

7 \+ 7 H

The heptasulfide catalyzes various reductions.[5]

Perrhenic acid in the presence of hydrochloric acid undergoes reduction in the presence of thioethers and tertiary phosphines to give rhenium(V) complexes with the formula ReOCl

2.[6]

Perrhenic acid combined with platinum on a support gives rise to a useful hydrogenation and hydrocracking catalyst for the petroleum industry.[7] 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.

### Catalysis

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. In combination with tertiary arsines, perrhenic acid gives a catalyst for the epoxidation of alkenes with hydrogen peroxide.[8] Perrhenic acid catalyses the dehydration of oximes to nitriles.[9]

400px

## Other uses

Perrhenic acid is also used in the manufacture of x-ray targets.[10][11]

## See also

* Perrhenate
* Rhenium(VII) oxide

## References

1. ↑ McDonald, F. E.; Towne, T. B.; Schultz, C. C. (1998-02-28). "Metal-oxo induced syn-oxidative polycyclizations of hydroxypolyenes: Biomimetic synthesis of polycyclic ether natural products" (in en). Pure and Applied Chemistry 70 (2): 355–358. doi:10.1351/pac199870020355. ISSN 1365-3075. https://www.degruyter.com/document/doi/10.1351/pac199870020355/html.
2. ↑ Glemser, O.; Müller, A.; Schwarzkopf, H. (1964). "Gasförmige Hydroxide. IX. Über ein Gasförmiges Hydroxid des Rheniums" (in German). Zeitschrift für anorganische und allgemeine Chemie 334 (1–2): 21–26. doi:10.1002/zaac.19643340105. .
3. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
4. ↑ Beyer, H.; Glemser, O.; Krebs, B. "Dirhenium Dihydratoheptoxide Re2O7(OH2)2 – New Type of Water Bonding in an Aquoxide" Angewandte Chemie, International Edition English 1968, Volume 7, Pages 295 - 296. doi:10.1002/anie.196802951.
5. ↑ Schwarz, D. E.; Frenkel, A. I.; Nuzzo, R. G.; Rauchfuss, T. B.; Vairavamurthy, A. (2004). "Electrosynthesis of ReS4. XAS Analysis of ReS2, Re2S7, and ReS4". Chemistry of Materials 16: 151–158. doi:10.1021/cm034467v.ReS4.+XAS+Analysis+of+ReS2,+Re2S7,+and+ReS4&rft.jtitle=Chemistry+of+Materials&rft.aulast=Schwarz,+D.+E.&rft.au=Schwarz,+D.+E.&rft.au=Frenkel,+A.+I.&rft.au=Nuzzo,+R.+G.&rft.au=Rauchfuss,+T.+B.&rft.au=Vairavamurthy,+A.&rft.date=2004&rft.volume=16&rft.pages=151–158&rft_id=info:doi/10.1021/cm034467v&rfr_id=info:sid/en.wikibooks.org:Chemistry:Perrhenic_acid">
6. ↑ Parshall, G. W.; Shive, L. W.; Cotton, F. A. (1997). Phosphine Complexes of Rhenium. Inorganic Syntheses. 17. pp. 110-112. doi:10.1002/9780470132487.ch31. ISBN 9780470132487.
7. ↑ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
8. ↑ van Vliet, M. C. A.; Arends, I. W. C. E.; Sheldon, R. A. (1999). "Rhenium Catalysed Epoxidations with Hydrogen Peroxide: Tertiary Arsines as Effective Cocatalysts". J. Chem. Soc., Perkin Trans. 1 (3): 377–80. doi:10.1039/a907975k.
9. ↑ Ishihara, K.; Furuya, Y.; Yamamoto, H. (2002). "Rhenium(VII) Oxo Complexes as Extremely Active Catalysts in the Dehydration of Primary Amides and Aldoximes to Nitriles". Angewandte Chemie International Edition 41 (16): 2983–2986. doi:10.1002/1521-3773(20020816)41:16<2983::AID-ANIE2983>3.0.CO;2-X. PMID 12203432.
10. ↑ http://www.gehealthcare.com/usen/service/time_material_support/docs/Radplus2100.pdf
11. ↑ X-ray

* v
* t
* e

Rhenium compounds

Rhenium(0)|

| Organorhenium(0)|

* Re2(CO)10

|

Rhenium(I)|

| Organorhenium(I)|

* Re(CO)5Br
* ReH(CO)5

|

Rhenium(II)|

* ReB2

Rhenium(III)|

* ReCl3

Rhenium(IV)|

* ReO2
* ReS2
* ReSe2
* ReTe2

Rhenium(V)|

* ReOCl3(P(C6H5)3)2
* ReCl5

Rhenium(VI)|

* ReF6
* ReO3

Rhenium(VII)|

* ReF7
* Re2O7
* Re2S7
* Re2O7(OH2)2
* NH4ReO4
* NaReO4
* K2ReH9

| Organorhenium(VII)|

* CH3ReO3

|

Template:Perrhenates

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Perrhenic acid. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Perrhenic_acid&oldid=4031160"
*[CID]: Compound ID
*[H302]: Harmful if swallowed
*[H314]: Causes severe skin burns and eye damage
*[H332]: Harmful if inhaled
*[P260]: Do not breathe dust/fume/gas/mist/vapours/spray
*[P261]: Avoid breathing dust/fume/gas/mist/vapours/spray
*[P264]: Wash … thoroughly after handling
*[P270]: Do not eat, drink or smoke when using this product
*[P271]: Use only outdoors or in a well-ventilated area
*[P280]: Wear protective gloves/protective clothing/eye protection/face protection
*[P301+312]: IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
*[P301+330+331]: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
*[P303+361+353]: IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower
*[P304+312]: IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell
*[P304+340]: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
*[P305+351+338]: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing
*[P310]: Immediately call a POISON CENTER or doctor/physician
*[P312]: Call a POISON CENTER or doctor/physician if you feel unwell
*[P321]: Specific treatment (see … on this label)
*[P330]: Rinse mouth
*[P363]: Wash contaminated clothing before reuse
*[P405]: Store locked up
*[P501]: Dispose of contents/container to …
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template