Rhenium

Chemical, physical and material properties and data of the chemical element Rhenium.

Contents

General Information about Rhenium

Regular nameRheniumChemical symbolReOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Rhenium

Atomic number Z75 = number of protonsStandard Atomic Weight186.207 (1)

Electron configuration of Rhenium

1s	2s	2p	3s	3p	3d	4s	4p	4d	4f	5s	5p	5d	5f	6s	6p	6d	6f	7s	7p
2	2	6	2	6	10	2	6	10	14	2	6	5		2

Shorthand electron configuration of Rhenium: [Xe] 4f¹⁴ 5d⁵ 6s² .

Ionization Energies of Rhenium

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volt (eV) per atom to separate a given electron from an Rhenium atom.

IE1
7.83352

Isotopic Data of Rhenium

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Rhenium isotopes.

Chemistry of Rhenium

Oxidation states+4Electronegativity1.9 (Pauling original)
1.90 (Pauling)
1.60 (Allen)
4.02 eV (Pearson)Electron affinity0.060 396(63) eV
5.8273(61) kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
-0.604	Re	+ VII 0	Perrhenate anion Rhenium	ReO₄^- + 2 H₂O ⇄ Re + 8 OH^-	+ 7 e^-
0.2513	Re	+ IV 0	Rhenium(IV) oxide Rhenium	ReO₂ + 4 H⁺ ⇄ Re + 2 H₂O	+ 4 e^-
0.300	Re	+ III 0	Rhenium(III) cation Rhenium	Re³⁺ ⇄ Re (s)	+ 3 e^-
0.34	Re	+ VII 0	Perrhenate anion Rhenium	ReO₄^- + 8 H⁺ ⇄ Re + 4 H₂O	+ 7 e^-
0.510	Re	+ VII + IV	Perrhenate anion Rhenium(IV)-oxid	ReO₄^- + 4 H⁺ ⇄ ReO₂ + 2 H₂O	+ 3 e^-
0.768	Re	+ VII + VI	Perrhenate anion Rhenium(VI) oxide	ReO₄^- + 2 H⁺ ⇄ ReO₃ + H₂O	+ e^-

Material and Physical Properties

Melting point3185 °CEnthalpy of fusion (molar)60.43 kJ mol^-1Boiling point5590 °CEnthalpy of vaporization707.1 kJ mol^-1Density21.02 g cm^-3 (20 °C)

External Data, Identifiers

CAS registry number7440-15-5InChI =1S/ReInChIKeyWUAPFZMCVAUBPE-UHFFFAOYSA-NPubChem ID23947

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Last update: 2022-12-12

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