Conductivity and solubility studies of some glycollates and lactates

Evans, Wynne; Monk, C. B.

doi:10.1039/jr9540000550

Cited by 15 publications

(7 citation statements)

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“…The values of 57LW and 58SL are from the same group and are provisional. The zero ionic strength values [54EM,65SM] are in excellent agreement and are provisional. The stability constant of 80PS appears to be too low compared with the values reported by other authors and is rejected.…”

Section: Formation Constants Of Complexes Of 2-hydroxyacetic Acid (Glsupporting

confidence: 57%

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Critical evaluation of stability constants for alpha-hydroxycarboxylic acid complexes with protons and metal ions and the accompanying enthalpy changes. Part II. Aliphatic 2-hydroxycarboxylic acids (IUPAC Technical Report)

Portanova

Lajunen

Tolazzi

et al. 2003

Pure and Applied Chemistry

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Section: Formation Constants Of Complexes Of 2-hydroxyacetic Acid (Glsupporting

confidence: 57%

“…The polarographic value of 70FB must be rejected for the same reasons mentioned above for the zinc(II) complexes. The remaining values are reliable and, therefore, provisional [54EM,70FM,69W].…”

confidence: 99%

Critical evaluation of stability constants for alpha-hydroxycarboxylic acid complexes with protons and metal ions and the accompanying enthalpy changes. Part II. Aliphatic 2-hydroxycarboxylic acids (IUPAC Technical Report)

Portanova

Lajunen

Tolazzi

et al. 2003

Pure and Applied Chemistry

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“…Some typical values for +Mnz+ complexes with organic ligands, evidently outer sphere, are 1.8 kJ/mol 5 -AGO 5 21 kJ/mol (13,(17)(18)(19)(20)(21).…”

Section: Resultsmentioning

confidence: 99%

The structure and equilibria of a manganese(II) complex of fulvic acid studied by ion exchange and nuclear magnetic resonance

Gamble¹,

Langford²,

Tong³

1976

Can. J. Chem.

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The binding of Mn2+ to a well characterized fulvic acid sample is reported based on the competition with K+ in an ion exchange equilibration. The free energy of binding of [Formula: see text] to fulvic acid is only 1–2 kJ/equivalent more favourable than that for K+. This suggests an outer sphere electrostatic structure for the complex. The suggestion is confirmed by observation of minimal change in the presence of fulvic acid of the effect of paramagnetic Mn2+ on the nmr spectra of water. The interpretation of nmr spectra is supported by comparison with nmr measurements of Mn2+ complexes with simple ligands and contrast with nmr measurements on Fe3+ – fulvic acid complexing. The latter is confirmed as inner sphere.

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“…• C) value from Evans and Monk [20] in our calculations. All three equilibria are observed in Cu(II) ions.…”

Section: Resultsmentioning

confidence: 95%

“…Earlier researchers reported that Ni(II) ion forms a chelate without deprotonation of α-OH group [19][20][21][22]. Stability constant determinations show that Complex 2 (reaction 7) is not observed, and we have used K 1 (183 at 25…”

Section: Resultsmentioning

confidence: 96%

Studies on the oxygen atom transfer reactions of peroxomonosulfate: Oxidation of glycolic acid

Andal

Murugavelu

Shailaja

et al. 2008

Int J of Chemical Kinetics

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The kinetics of oxidation of glycolic acid, an α-hydroxy acid, by peroxomonosulfate (PMS) was studied in the presence of Ni(II) and Cu(II) ions and in acidic pH range 4.05-5.89. The metal glycolate, not the glycolic acid (GLYCA), is oxidized by PMS. The rate is first order in [PMS] and metal ion concentrations. The oxidation of nickel glycolate is zero-order in [GLYCA] and inverse first order in [H + ]. The increase of [GLYCA] decreases the rate in copper glycolate, and the rate constants initially increase and then remain constant with pH. The results suggest that the metal glycolate ML + reacts with PMS through a metal-peroxide intermediate, which transforms slowly into a hydroperoxide intermediate by the oxygen atom transfer to hydroxyl group of the chelated GLYCA. The effect of hydrogen ion concentrations on k obs suggests that the structure of the metal-peroxide intermediates may be different in Ni(II) and Cu(II) glycolates. C

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Conductivity and solubility studies of some glycollates and lactates

Cited by 15 publications

References 0 publications

Critical evaluation of stability constants for alpha-hydroxycarboxylic acid complexes with protons and metal ions and the accompanying enthalpy changes. Part II. Aliphatic 2-hydroxycarboxylic acids (IUPAC Technical Report)

Critical evaluation of stability constants for alpha-hydroxycarboxylic acid complexes with protons and metal ions and the accompanying enthalpy changes. Part II. Aliphatic 2-hydroxycarboxylic acids (IUPAC Technical Report)

The structure and equilibria of a manganese(II) complex of fulvic acid studied by ion exchange and nuclear magnetic resonance

Studies on the oxygen atom transfer reactions of peroxomonosulfate: Oxidation of glycolic acid

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