Summary
The chelate formation reaction of La(III), Pr(III), Nd(III), Gd(III), Ho(III), and Er(III) witho-arsonodibenzoylmethanephenylhydrazone has been investigated potentiometrically and conductometrically in 40% (v/v) aqueous ethanol, ionic strength 0.1M. The order of stability constants was found to be La < Pr < Nd > Gd < Ho < Er. The chelates formed have 1:1 and 1:2 stoichiometries (M 3+:L). The complexes have been isolated in solid state and have been characterized on the basis of elemental analysis and IR data. Coordination occurs through -NH of the hydrazo and-OH of the arsonic groups.
Zusammenfassung
Die Reaktion der Chelatbildung von La(III), Pr(III), Nd(III), Gd(III), Ho(III) und Er(III) mito-Arsonodibenzoylmethanphenylhydrazon wurde potentiometrisch und konduktometrisch in 40% (v/v) wäßrigem Ethanol bei einer Ionenstärke von 0.1M untersucht. Die Reihung der Stabilitätskonstanten war La < Pr < Nd > Gd < Ho < Er. Die Chelate haben 1:1 und 1:2 Stöchiometrien (M 3+:L). Die Komplexe wurden im Festzustand isoliert und mittels Elementaranalyse und IR-Spektroskopie charakterisiert. Die Koordinierung erfolgt über -NH der Hydrazo- und -OH der Arsongruppe.
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Mohamed, H.A., Omar, M.M. & Issa, Y.M. Chelation behaviour of lanthanons witho-arsonodibenzoylmethanephenylhydrazone. Monatsh Chem 121, 351–356 (1990). https://doi.org/10.1007/BF00809449
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DOI: https://doi.org/10.1007/BF00809449