Metal chelates of azo-pyridazine dyes
Identifieur interne : 002069 ( Istex/Curation ); précédent : 002068; suivant : 002070Metal chelates of azo-pyridazine dyes
Auteurs : Atef A. T. Ramadan [Égypte] ; Magdy H. Seada [Égypte] ; Emil N. Rizkalla [Égypte]Source :
- Talanta [ 0039-9140 ] ; 1983.
Descripteurs français
- Wicri :
- topic : Cobalt.
English descriptors
- KwdEn :
- Alkaline media, Bahp, Chelate, Chem, Cobalt, Copper chelates, Drastic conditions, Electronic absorption spectra, Free ligand, High affinities, Hydrazo group, Infrared spectrum, Ionic strength, Lanthanide ions, Ligand, Lower frequency, Metal chelates, Metal ions, Molar, Molar absorptivities, Molar ratio, Nitrogen atoms, Shams university, Solid copper, Stability constants, Titration curves, Ultraviolet spectrum.
- Teeft :
- Alkaline media, Bahp, Chelate, Chem, Cobalt, Copper chelates, Drastic conditions, Electronic absorption spectra, Free ligand, High affinities, Hydrazo group, Infrared spectrum, Ionic strength, Lanthanide ions, Ligand, Lower frequency, Metal chelates, Metal ions, Molar, Molar absorptivities, Molar ratio, Nitrogen atoms, Shams university, Solid copper, Stability constants, Titration curves, Ultraviolet spectrum.
Abstract
Abstract: The synthesis, acid-base equilibria and metal-ion chelating tendencies of BAHP are reported. From potentiometric equilibrium measurements of hydrogen-ion concentration at 30° and ionic strength 0.10M (KNO3), in 75% dioxan-water medium, the values of the stability constants of some BAHP complexes with transition, non-transition and lanthanide ions have been evaluated. Probable structures of the metal chelates are inferred from the electronic absorption spectra and infrared examination of the solid copper complex. The use of BAHP as an analytical reagent for the spectrophotometric determination of copper, nickel and cobalt ions is discussed.
Url:
DOI: 10.1016/0039-9140(83)80057-5
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ISTEX:934DB6F4FABA5BCBAEAC8141A43B712C9CD137E4Le document en format XML
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<term>Drastic conditions</term>
<term>Electronic absorption spectra</term>
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<term>Stability constants</term>
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<term>Hydrazo group</term>
<term>Infrared spectrum</term>
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<term>Molar absorptivities</term>
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<term>Stability constants</term>
<term>Titration curves</term>
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<front><div type="abstract" xml:lang="en">Abstract: The synthesis, acid-base equilibria and metal-ion chelating tendencies of BAHP are reported. From potentiometric equilibrium measurements of hydrogen-ion concentration at 30° and ionic strength 0.10M (KNO3), in 75% dioxan-water medium, the values of the stability constants of some BAHP complexes with transition, non-transition and lanthanide ions have been evaluated. Probable structures of the metal chelates are inferred from the electronic absorption spectra and infrared examination of the solid copper complex. The use of BAHP as an analytical reagent for the spectrophotometric determination of copper, nickel and cobalt ions is discussed.</div>
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