Sodium perrhenate

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.

Sodium perrhenate

Names
Other names Sodium rhenate(VII)
Identifiers
CAS Number	13472-33-8 Y
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL444819 N
ECHA InfoCard	100.033.388
PubChem CID	5107658
RTECS number	WD3675000
UNII	PE1T8NN47Q Y
CompTox Dashboard (EPA)	DTXSID60893935
InChI InChI=1S/Na.4O.Re/q+1;;;;-1;
SMILES [O-][Re](=O)(=O)=O.[Na+]
Properties
Chemical formula	NaReO4
Molar mass	273.1866 g/mol
Appearance	white solid
Density	5.39 g/cm3
Melting point	414 °C (777 °F; 687 K)
Solubility in water	103.3 g/100 mL (0 °C) 114.0 g/100 mL (25 °C)[1] 145.3 g/100 mL (30 °C) 173.0 g/100 mL (50 °C)
Solubility	soluble in water (> 1130 g/L at 25 °C)[1]
Structure
Crystal structure	tetragonal
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Oxidizer, skin/eyes irritation
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

Preparation

It can be prepared by treatment of rhenium heptoxide with base or by ion exchange from the potassium salt.^[2]

Sodium perrhenate can be prepared from rhenium metal with hydrogen peroxide in the presence of base.^[3]

${\displaystyle {\ce {2 Re + 7 H2O2 + 2 NaOH -> 2 NaReO4 + 8 H2O}}}$

Reactions

It reacts with sodium in ethanol to give nonahydridorhenate.^[2]

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.^[4]

It can be used to prepare Re₂(CO)₁₀.^[3]

References

1. Luis Cifuentes, J. M. Casas (February 2012). "Crystallization of Sodium Perrhenate from NaReO₄–H₂O–C₂H₅OH Solutions at 298 K". Hydrometalurgy. 113–114: 192–194. Bibcode:2012HydMe.113..192C. doi:10.1016/j.hydromet.2011.12.022.
2. A. P. Ginsberg; C. R. Sprinkle (1972). "Nonahydridorhenate Salts". Inorganic Syntheses. Vol. 13. pp. 219–225. doi:10.1002/9780470132449.ch45. ISBN 978-0-470-13244-9.
3. Crocker, Lisa S.; Gould, George L.; Heinekey, D. Michael (1988). "Improved Synthesis of Carbonylrhenium". Journal of Organometallic Chemistry. 342 (2): 243–244. doi:10.1016/s0022-328x(00)99461-0.
4. Hämäläinen, Jani; Mizohata, Kenichiro; Meinander, Kristoffer; Mattinen, Miika; Vehkamäki, Marko; Räisänen, Jyrki; Ritala, Mikko; Leskelä, Markku (2018-08-27). "Rhenium Metal and Rhenium Nitride Thin Films Grown by Atomic Layer Deposition". Angewandte Chemie International Edition. 57 (44): 14538–14542. doi:10.1002/anie.201806985. hdl:10138/325623. ISSN 1433-7851. PMID 30048031. S2CID 51721705.

Further reading

• Ahluwalia, J. C.; Cobble, J. W. (1 December 1964). "The Thermodynamic Properties of High Temperature Aqueous Solutions. II. Standard Partial Molal Heat Capacities of Sodium Perrhenate and Perrhenic Acid from 0 to 100o". Journal of the American Chemical Society. 86 (24): 5377–5381. doi:10.1021/ja01078a001.
• Dwek, Raymond A.; Luz, Z.; Shporer, M. (1 May 1970). "Nuclear magnetic resonance of aqueous solutions of sodium perrhenate". The Journal of Physical Chemistry. 74 (10): 2232–2233. doi:10.1021/j100909a038.