Spectrophotometometric and potentiometric studies on cr [lll], Mn [ll], Fe[III], Co [ll] and Ni [ll] complexes with 5,7-dinitroso-6-hydroxy-4-methylcoumarin
Egyptian Journal of Chemistry. 1999; 42 (4): 347-360
in English
| IMEMR
| ID: emr-107889
ABSTRACT
The composition, stability constants and optimal formation conditions of the complexes of Cr3+, Mn2+, Fe3+, Co2+ and Ni2+ with 5, 7-dinitroso-6-hydroxy-4-methylcoumarin have been studied spectrophotometrically. The stoichiometries of the complexes showed that 1 1 and 1 2 [M L] species were formed and the influence of foreign ions was investigated. The ionization constants [pKa] of the investigated ligand and stability constants of the metal ions complexes were determined, potentiometrically, in 40% ethanolic solution
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Index:
IMEMR (Eastern Mediterranean)
Main subject:
Potentiometry
/
Spectrophotometry
/
Chromium
/
Cobalt
/
Manganese
/
Nickel
Language:
English
Journal:
Egypt. J. Chem.
Year:
1999
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