Sodium perrhenate

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 311320281

| Name = Sodium perrhenate

| ImageFile1 = NaReO4tetra.png

| ImageSize1 = 160px

| ImageFile2 = NaReO4.JPG

| ImageSize2 = 160px

| OtherNames = Sodium rhenate(VII)

| Section1 = {{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|??}}

| CASNo = 13472-33-8

| ChEMBL_Ref = {{ebicite|changed|EBI}}

| ChEMBL = 444819

| ChemSpiderID = 4282939

| EC_number = 236-742-9

| PubChem = 5107658

| RTECS = WD3675000

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = PE1T8NN47Q

| InChI = 1S/Na.4O.Re/q+1;;;;-1;

| InChIKey = KMISVFTVBOPTAI-UHFFFAOYSA-N

| SMILES = [O-][Re](=O)(=O)=O.[Na+]}}

| Section2 = {{Chembox Properties

| Formula = NaReO₄

| MolarMass = 273.1866 g/mol

| Appearance = white solid

| Density = 5.39 g/cm³

| MeltingPtC = 414

| Solubility = 103.3 g/100 mL (0 °C)
114.0 g/100 mL (25 °C){{cite journal |last1=Luis Cifuentes|first1=J. M. Casas|title=Crystallization of Sodium Perrhenate from NaReO₄–H₂O–C₂H₅OH Solutions at 298 K|journal=Hydrometalurgy |date=February 2012 |volume=113-114 |pages=192–194 |doi=10.1016/j.hydromet.2011.12.022|bibcode=2012HydMe.113..192C |hdl=10533/129813 |hdl-access=free }}
145.3 g/100 mL (30 °C)
173.0 g/100 mL (50 °C)

| SolubleOther = soluble in water (> 1130 g/L at 25 °C)}}

| Section3 = {{Chembox Structure

| CrystalStruct = tetragonal}}

| Section7 = {{Chembox Hazards

| MainHazards = Oxidizer, skin/eyes irritation}}}}

Sodium perrhenate (also known as sodium rhenate(VII)) is the inorganic compound with the formula NaReO₄. It is a white salt that is soluble in water. It is a common precursor to other rhenium compounds. Its structure resembles that of sodium perchlorate and sodium permanganate.

Preparation

It can be prepared by treatment of rhenium heptoxide with base or by ion exchange from the potassium salt.{{cite book|chapter=Nonahydridorhenate Salts|author=A. P. Ginsberg |author2=C. R. Sprinkle |title=Inorganic Syntheses|year=1972|volume=13|pages=219–225|doi=10.1002/9780470132449.ch45|isbn=978-0-470-13244-9}}

Sodium perrhenate can be prepared from rhenium metal with hydrogen peroxide in the presence of base.{{cite journal|last1=Crocker|first1=Lisa S.|last2=Gould|first2=George L.|last3=Heinekey|first3=D. Michael|year=1988|title=Improved Synthesis of Carbonylrhenium|journal=Journal of Organometallic Chemistry|volume=342|issue=2|pages=243–244|doi=10.1016/s0022-328x(00)99461-0}}

:{{chem2 | 2 Re + 7 H2O2 + 2 NaOH -> 2 NaReO4 + 8 H2O }}

Reactions

It reacts with sodium in ethanol to give nonahydridorhenate.

Sodium perrhenate has been used as a precursor of rhenium nitrides (such as Re₃N, Re₂N, Re₃N₂, ReN₂, ReN₃, ReN₄), which can be used as catalysts for ammonia synthesis and for hydro-denitrogenation.{{cite journal|last1=Hämäläinen|first1=Jani|last2=Mizohata|first2=Kenichiro|last3=Meinander|first3=Kristoffer|last4=Mattinen|first4=Miika|last5=Vehkamäki|first5=Marko|last6=Räisänen|first6=Jyrki|last7=Ritala|first7=Mikko|last8=Leskelä|first8=Markku|date=2018-08-27|title=Rhenium Metal and Rhenium Nitride Thin Films Grown by Atomic Layer Deposition|journal=Angewandte Chemie International Edition|volume=57|issue=44|pages=14538–14542|language=en|doi=10.1002/anie.201806985|pmid=30048031|bibcode=2018ACIE...5714538H |issn=1433-7851|hdl=10138/325623|s2cid=51721705|hdl-access=free}}

It can be used to prepare Re₂(CO)₁₀.

Sodium perrhenate

Preparation

Reactions

References

Further reading