The equil. of Cr(III) with chromotropic acid (I) in 0.5M KCl were studied at 25° by spectrophotometric methods. Mononuclear and binuclear species with metal: ligand ratios 1:1, 1:2, and 2:1 were found in acid medium. The spectrophotometric characteristics and the equil. consts. for the various species are reported. The spectrophotometric detn. of Cr(III) by I is not satisfactory because of modification of I by light and by oxidizing agents, low selectivity (many ions interfere), and low sensitivity compared to complexing agents such as Chromazurol S and pyrocatechol violet.
Reaction of phenolic ligands with metal ions. Reaction of chromium(III) with chromotropic acid / Chiacchierini, E.; Magri', Antonio; Balestrieri, F.. - In: ANNALI DI CHIMICA. - ISSN 0003-4592. - STAMPA. - 64:9-10(1974), pp. 725-734.
Reaction of phenolic ligands with metal ions. Reaction of chromium(III) with chromotropic acid
MAGRI', Antonio;
1974
Abstract
The equil. of Cr(III) with chromotropic acid (I) in 0.5M KCl were studied at 25° by spectrophotometric methods. Mononuclear and binuclear species with metal: ligand ratios 1:1, 1:2, and 2:1 were found in acid medium. The spectrophotometric characteristics and the equil. consts. for the various species are reported. The spectrophotometric detn. of Cr(III) by I is not satisfactory because of modification of I by light and by oxidizing agents, low selectivity (many ions interfere), and low sensitivity compared to complexing agents such as Chromazurol S and pyrocatechol violet.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
