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]

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]