The Basicity Constant of p-Benzoquinone. Comparison of the Quinhydrone Half-cell with the Hydrogen Half-cell in HClO4-NaClO4 Ionic Medium.

Biedermann, George; Prytz, Milda; Jensen, R. B.; Eliasson, N. A.; Thorell, B.

doi:10.3891/acta.chem.scand.10-1340

Cited by 20 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the basicity of Q is as high as suggested by Biedermann (25), the QH + scheme is an attractive explanation for wave II. This scheme is in accord with the kinetic character of the wave and the appearance of the wave at roughly the same potential on both mercury and platinum electrodes.…”

Section: February Lgtomentioning

confidence: 90%

See 1 more Smart Citation

Proton Effects in the Electrochemistry of the Quinone Hydroquinone System in Aprotic Solvents

Eggins¹,

Chambers²

1970

J. Electrochem. Soc.

183

118

View full text Add to dashboard Cite

Electrochemical and spectroscopic techniques have been used to study the benzo‐, duro‐, tetrachloro‐, and p‐xyloquinone‐hydroquinone couples in nonaqueous solvents. The proton transfer reactions which are coupled to the electron transfer steps are elucidated. Oxidation of the hydroquinone leads to the protonated quinone species, while reduction of the quinones in the presence of a proton source gives mixtures of the corresponding hydroquinone, its conjugate base, and the free semiquinone, depending on the amount and strength of the proton donor used. Oxidation of the hydroquinones is postulated to proceed via a dimer of the one‐electron intermediate. Preliminary results are reported on the electrochemical behavior of solutions containing the quinhydrone charge‐transfer complex.

show abstract

Section: February Lgtomentioning

confidence: 90%

“…to be --1.0 in aqueous solutions (25). However, there is some dispute over this value since quinone species which are stable in concentrated acid solutions give pK values considerably lower on a Hammett acidity function scale (26,27).…”

Section: February Lgtomentioning

confidence: 99%

Proton Effects in the Electrochemistry of the Quinone Hydroquinone System in Aprotic Solvents

Eggins¹,

Chambers²

1970

J. Electrochem. Soc.

183

118

View full text Add to dashboard Cite

show abstract

“…The association constant of the p-benzoquinone molecule with a proton in aqueous solution has been estimated as 0.1 l./mole by Biedermann. 18 The free energy of formation of the protonated quinone is then about 1.3 kcal/mole. There is no information about the stability of the protonated form of the semiquinone.…”

Section: Q+2h++2e+qh2mentioning

confidence: 99%

Reduction of p-quinones at a dropping mercury electrode

Hale¹,

Parsons²

1963

Trans. Faraday Soc.

View full text Add to dashboard Cite

The reduction of unsubstituted pquinones has been studied by measuring current-voltage curves at a dropping mercury electrode. Rate constants and transfer coef€icients for the reduction were derived by Koutecky's method. The energies of the various possible intermediate species are estimated and it is suggested, in agreement with Vetter,3 that two oneelectron transfers of almost equal activation energy occur. The value of the free energy of activation is consistent with the Hush 2o-Marcus 19 theory of electron transfer reactions. The effect of the molecular size of the quinone is expressed primarily through the energy of formation of the semiquinone.* DMF-dimethyl formamide : the results for this system were obtained from a cathodic wave analyzed by the procedure described elsewhere.10

show abstract

Löslichkeiten und Aktivitätskoeffizienten von H₂S in Elektrolytmischungen

Gamsjäger

Schindler

1969

Helvetica Chimica Acta

View full text Add to dashboard Cite

From solubility measurements on hydrogen sulfide in aqueous solutions of the composition [H+] = HM, [Na+] = (I — H) M = A M, [Cl−] = I M at 25°C, the molar and molal activity coefficients of H2S have been calculated. The activity coefficients of H2S in the electrolyte mixtures have been found to be additive functions of the activity coefficients in the individual electrolyte solutions at the same ionic strength. This result is predicted by the internal pressure theory of salt effects on non‐electrolyte activity coefficients, provided that the volume change upon mixing two electrolyte solutions of the same ionic strength is zero.

show abstract

The Basicity Constant of p-Benzoquinone. Comparison of the Quinhydrone Half-cell with the Hydrogen Half-cell in HClO4-NaClO4 Ionic Medium.

Cited by 20 publications

References 0 publications

Proton Effects in the Electrochemistry of the Quinone Hydroquinone System in Aprotic Solvents

Proton Effects in the Electrochemistry of the Quinone Hydroquinone System in Aprotic Solvents

Reduction of p-quinones at a dropping mercury electrode

Löslichkeiten und Aktivitätskoeffizienten von H₂S in Elektrolytmischungen

Contact Info

Product

Resources

About

The Basicity Constant of p-Benzoquinone. Comparison of the Quinhydrone Half-cell with the Hydrogen Half-cell in HClO4-NaClO4 Ionic Medium.

Cited by 20 publications

References 0 publications

Proton Effects in the Electrochemistry of the Quinone Hydroquinone System in Aprotic Solvents

Proton Effects in the Electrochemistry of the Quinone Hydroquinone System in Aprotic Solvents

Reduction of p-quinones at a dropping mercury electrode

Löslichkeiten und Aktivitätskoeffizienten von H2S in Elektrolytmischungen

Contact Info

Product

Resources

About

Löslichkeiten und Aktivitätskoeffizienten von H₂S in Elektrolytmischungen