Complexant efficiency of 2′-hydroxy-4-R-chalcones for Aluminium (III) and substituent's effect

The complexant efficiency with aluminium of 2′-hydroxy-4-R-chalcones, which depends on the nature and positions of the substituent was studied by a spectrophotometric method. The apparent formation constant was determined. The quantitative analysis of the substituent's influence on the complexa...

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Bibliographic Details
Published in:Talanta (Oxford) 1997-11, Vol.44 (11), p.1967-1971
Main Authors: Debattista, Nora B., Pappano, Nora B.
Format: Article
Language:English
Subjects:
2′-hydroxy-4-R-chalcones
Aluminium
Chemistry
Coordination compounds
Exact sciences and technology
Inorganic chemistry and origins of life
Preparations and properties
Spectrophotometric
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Summary:The complexant efficiency with aluminium of 2′-hydroxy-4-R-chalcones, which depends on the nature and positions of the substituent was studied by a spectrophotometric method. The apparent formation constant was determined. The quantitative analysis of the substituent's influence on the complexation reaction equilibrium was made using the Hammett relation. The constant σ magnitudes of groups OH, OCH 3, Cl and F in the 4-position agree with values reported in the literature.
ISSN:0039-9140
1873-3573
DOI:10.1016/S0039-9140(96)02123-6