The successive formation constants and proposed models of the lighter lanthanide mandelates

Powell, J.E.; Neillie, W.F.S.

doi:10.1016/0022-1902(67)80293-8

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…On the other hand, little work has appeared on the separation of a-hydroxyacids or diols enantiomers, probably because these compounds show a less uniform behaviour than the amino acids. However, the complexing properties of dihydroxy compounds such as mandelic acid (6,7) or catechol derivatives (8) with some metals, especially Cu, Zn, and Cd, have already been described and used in several analytical techniques (9,10).…”

Section: Introductionmentioning

confidence: 99%

Stereoselective effect on ternary complexation of copper ions with N,N′-dimethyltartramide and mandelic acid

Petit‐Ramel¹,

Rycke²,

Rio³

et al. 1983

Can. J. Chem.

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. Can. J. Chem. 61, 2151 (1983). The binary and ternary complexation in aqueous solution between coppcr(l1) ion, N,N1-dimethyltartramide (H2A) and mandelic acid (HB). were studied by potcntiornctric measurements in the 5-10 pH range at 25°C and p. = I M in NaCIOI. The titrations were analyzed using a pit-mapping method and the concentration distribution of the various simple and mixed compiexes were plotted versus a pH gradient. A significant stereoselective effect is displayed in the ternary complexes only.

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Section: Introductionmentioning

confidence: 99%

Stereoselective effect on ternary complexation of copper ions with N,N′-dimethyltartramide and mandelic acid

Petit‐Ramel¹,

Rycke²,

Rio³

et al. 1983

Can. J. Chem.

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“…Some studies related to successive formations constants [6], calorimetric titration of complexation of lanthanide mandelates with 1,10-phenanthroline [7], kinetics of complexation [8], preparation and structural analysis of lanthanide complexes with α-hydroxyphenylacetic acid and 1,10-phenanthroline as ligands [9], synthesis, crystal and spectroscopic studies of some lanthanides [10][11][12] and synthesis, thermal properties and spectroscopic study of solid mandelate of light trivalent lanthanides [13] were also reported.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Thermal Behaviour of Solid-State Compounds of Heavy Trivalent Lanthanide and Yttrium Mandelates

Gigante¹,

Gomes²,

Lima³

et al. 2014

Braz. J. Therm. Anal.

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Characterization, thermal stability and thermal decomposition of heavy trivalent lanthanide mandelates Ln(C 6 H 5 CH(OH)CO 2 ) 3 ·2H 2 O (Ln = Tb to Lu and Y) were investigated employing simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), experimental and theoretical infrared spectroscopy, X-ray diffractometry, complexometry and TG-DSC coupled to FTIR. The dehydration of the compounds occurs in a single step and the thermal decomposition of the anhydrous ones occurs in two, three, four or five consecutive steps, with formation of the respective oxides Tb 4 O 7 and Ln 2 O 3 (Ln = Dy to Lu and Y) as final residues. The results also provided information concerning the composition, thermal behavior and gaseous products evolved during the thermal decomposition of these compounds. The theoretical and experimental spectroscopic data suggest the possible modes of coordination of the ligand with the heavy lanthanides.

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Equilibria and thermodynamic quantities for the reactions of molybdenum(VI) and tungsten(VI) with mandelate (α-hydroxybenzeneacetate)

Cruywagen¹,

Rohwer²

1995

J. Chem. Soc., Dalton Trans.

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The complex formation of molybdate and tungstate with mandelate [PhCH (OH)CO,-] have been investigated in the range pH, 7.5-1.5 by potentiometric, spectrophotometric and enthalpimetric titrations at 25 "C in 1.0 mol dm-3 NaCI. The potentiometric data were treated with the computer program SUPERQUAD taking into account the side-reactions of molybdate and tungstate with hydrogen ions. For both systems the 'best' reaction model comprises only one major complex and a number of minor complexes. Thermodynamic quantities have been determined for each of the major complexes. For the molybdenum(vt) complex [MOO,(C,H,O,),]~-. log p, , , = 15.93, AH" = -78.2 and TAS" = 12.7 k J mo1-l respectively and for the tungsten(v1) complex, [W02(C6HS03)2]2-, log p, , , = 17.59, A H = -86.3 and TAS" = 14.1 k J mol-l. The equilibrium constant and the enthalpy change for the protonation of mandelate have also been determined, log K = 3.1 5 and AH = -0.05 k J mot l. The energetics of complexation is discussed in terms of the thermodynamic quantities.

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The successive formation constants and proposed models of the lighter lanthanide mandelates

Cited by 3 publications

References 9 publications

Stereoselective effect on ternary complexation of copper ions with N,N′-dimethyltartramide and mandelic acid

Stereoselective effect on ternary complexation of copper ions with N,N′-dimethyltartramide and mandelic acid

Synthesis, Characterization and Thermal Behaviour of Solid-State Compounds of Heavy Trivalent Lanthanide and Yttrium Mandelates

Equilibria and thermodynamic quantities for the reactions of molybdenum(VI) and tungsten(VI) with mandelate (α-hydroxybenzeneacetate)

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