Critical Evaluation of Stability Constants for α-Hydroxycarboxylic Acid Complexes with Protons and Metal Ions and the Accompanying Enthalpy Changes Part II: Aliphatic α-Hydroxycarboxylic Acids (IUPAC Technical Report)

2003 ◽  
Vol 25 (4) ◽  
2003 ◽  
Vol 75 (4) ◽  
pp. 495-540 ◽  
Author(s):  
R. Portanova ◽  
L. H. J. Lajunen ◽  
M. Tolazzi ◽  
J. Piispanen

Stability constants for different aliphatic 2-hydroxycarboxylic acid complexes in aqueous solutions with protons and metal ions published between 1960 and the end of 1994 have been critically evaluated.


2003 ◽  
Vol 75 (1) ◽  
pp. 71-102 ◽  
Author(s):  
Francoise Arnaud-Neu ◽  
Rita Delgado ◽  
Sílvia Chaves

Stability constants and thermodynamic functions of metal complexes of crown ethers in various solvents published between 1971 and the beginning of 2000 have been critically evaluated. The most studied crown ethers have been selected: 1,4,7,10 tetraoxacyclododecane (12C4), 1,4,7,10,13 pentaoxacyclopentadecane (15C5), and 1,4,7,10,13,16 hexaoxacyclooctadecane (18C6). The metal ions chosen are: alkali and alkaline earth metal ions, Ag+, Tl+, Cd2+, and Pb2+. The solvents considered are: water, methanol, ethanol, and their mixtures, as well as acetonitrile, N,N'-dimethylformamide, dimethylsulfoxide, and propylene carbonate. The published data have been examined and grouped into two categories, “accepted” and “rejected”. The “accepted” values were considered as: (i) recommended (R), when the standard deviations (s.d.) on the constant K or on ΔrH were inferior to 0.05 lg unit or inferior to 1 kJ mol−1, respectively; (ii) provisional (P), when s.d. is superior to 0.05 and inferior to 0.2 for lg K or s.d. is superior to 1 and inferior to 2 kJ mol−1 for ΔrH; (iii) recommended 1 (R1), if the values were obtained by a single research group, but were considered reliable in comparison with related systems, and considering that the research team usually presents R-level values for other similar systems.


2002 ◽  
Vol 74 (11) ◽  
pp. 2227 ◽  
Author(s):  
Konstantin Popov ◽  
Hannu Rönkkömäki ◽  
Lauri H. J. Lajunen

The following reference citations were incorrect: Page 1643: replace 93SC with 93SK Page 1657: replace H+: 98KK with H+: 98KA Page 1657: replace Cu2+: 98KK with Cu2+: 98KA Page 1668: replace 90S with 90SW Page 1673: replace 68BE with 67BE Page 1666: replace 95WJ J.M. Wagener and N.V. Jarvis. S. Afr. J. Chem. 28, 85 (1995) with 95WJ J.M. Wagener and N.V. Jarvis. S. Afr. J. Chem. 48, 85 (1995) Page 1666: replace 95I with 95IU Page 1668: replace 90K A T. Kiss with 90KA T. Kiss


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