Aqueous complexes of gallium(III)

Ethylenediamine-N,N′-diacetic acid complexes with divalent manganese, zinc, cadmium, and lead: a thermodynamic study

“…Titration soli~tions under iU, de\eloped a pale amber colour at pH > IO: on exposure to air these iolutions rapidly became deep amber and precipitated MnO,. The trio bulTer regions \\ere interpreted in terms of reactions [I] and [2], rcspecti\ely. V a i~~e s of log K, a.nd log K, are gi\en in Table 2.…”

Critical Evaluation of Stability Constants of Metal Complexes of Complexones for Biomedical and Environmental Applications (IUPAC Technical Report)

“…The resultant constants are lower and require correction in order to allow comparison with other values. For I = 0.1 mol L -1 KNO 3 and 25 °C, the protonation constants measured by titration with KOH [98AKa,97DFa,79LMa,76HMd] give the accepted values in Table 4. For Na + , the complex formation has not been studied in detail.…”

“…In these cases, direct potentiometric or spectrophotometric titrations cannot readily be used. Reaction with a competing ligand: 2,2',2''-triaminotriethylamine, (tren), 2,2'-{ethane-1,2-diylbis[(2-hydroxybenzyl)azanediyl]}diacetic acid, (N,N'-di-(2-hydroxybenzyl)-diaminoethane-N,N'-diacetic acid, HBED) [99DLa,76AMa,76HMd,59CFc] or competing cation (Hg 2+ [59CFc], Ga 3+ [88THa], Cu 2+ [72BCb]) is required. This in turn introduces additional systematic errors and problems.…”

Stability constant estimator user`s guide

“…-This type of correlation has been reported for: M g O with oxines (Irving and Rossotti 1956), M g O to B a O with aminocarboxylates (Irving and da Silva 1963;Miles 1966a, 1966b), F e O with pyridines (da Silva and Calado 1966), F e w with phenols (Ernst and Herring 1964;Hancock and Marsicano 1980a), Fe(III) with carboxylic acids (Hancock and Marsicano 1980a), C o o with polyamines (Harris et al 1978), Ni(II) with oxines (Jones et al 1958), N i O with polyamines (Harris et al 1978), C u O with Ddiketonates (Calvin and Wilson 1945;da Silva and Calado 1966), C u O with salicylaldehydes (Calvin and Wilson 1945), Cum with benzoic acids (May and Jones 1962;da Silva and Calado 1966), C u o with pyridines (Sun and Brewer 1967), C u O with oxines (Irving a d Rossotti 1956), Z n O with polyamines (Harris et al 1978), Z n O with aminocarboxylates (Irving and da Silva 1963;Miles 1966a, 1966b), Z n O with oxines (Jones et al 1958), Z n O with pyridines (Sun and Brewer 1967), G a m with aminocarboxylates (Harris and Martell 1976;Motekaitis and Martell 1980), A g o with pyridines (Da Silva and Calado 1966;Sun and Brewer 1967), A g o with anilines (da Silva and Calado 1966), A g o with phenylthioacetic acids (Pettit et al 1968a), U 0 2 0 with carboxylic acids and phenols (Hancock and Marsicano 1980a).…”