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3[Cu(SCN)2] + 4e → 2CuSCN + [Cu(CN)4]3− + 2S22−

Reduction of bis(thiocyanato)cuprate(I) ion
3[Cu(SCN)2]Bis(thiocyanato)cuprate(I) ion + 4eElectron
2CuSCNCopper(I) thiocyanate + [Cu(CN)4]3−Tetracyanidocuprate(I) ion + 2S22−Disulfide ion

Reduction of bis(thiocyanato)cuprate(I) ion yields copper(I) thiocyanate, tetracyanidocuprate(I) ion, and disulfide ion (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related reactions
  5. 5Related categories

Reaction data

Chemical equation

Reduction of bis(thiocyanato)cuprate(I) ion
3[Cu(SCN)2]Bis(thiocyanato)cuprate(I) ion + 4eElectron
2CuSCNCopper(I) thiocyanate + [Cu(CN)4]3−Tetracyanidocuprate(I) ion + 2S22−Disulfide ion

General equation

Reduction of reducible species
ReactantOxidizing agent + e
ProductReduction product

Oxidation state of each atom

Reduction of bis(thiocyanato)cuprate(I) ion

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
[Cu(SCN)2]Bis(thiocyanato)cuprate(I) ion3
Oxidizing
eElectron4
Electron

Products

Chemical formulaNameCoefficientTypeType in general
equation
CuSCNCopper(I) thiocyanate2
[Cu(CN)4]3−Tetracyanidocuprate(I) ion1
Reduced
S22−Disulfide ion2

Thermodynamic changes

Thermodynamic data of reactants

Chemical formulaStandard enthalpy
of formation
ΔfH°
kJ · mol−1
Standard Gibbs
energy of
formation
ΔfG°
kJ · mol−1
Standard
molar entropy
S°
J · K−1 · mol−1
Standard molar
heat capacity at
constant pressure
Cp°
J · K−1 · mol−1
[Cu(SCN)2]
e

Thermodynamic data of products

Chemical formulaStandard enthalpy
of formation
ΔfH°
kJ · mol−1
Standard Gibbs
energy of
formation
ΔfG°
kJ · mol−1
Standard
molar entropy
S°
J · K−1 · mol−1
Standard molar
heat capacity at
constant pressure
Cp°
J · K−1 · mol−1
CuSCN (cr)69.9[1]
CuSCN (ai)148.11[1]142.69[1]184.9[1]
[Cu(CN)4]3−
S22− (ao)30.1[1]79.5[1]28.5[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)