Determination of the binding constants of propeller-like metal complexes of picolinaldehyde-2-pyridylhydrazone

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Title:	Determination of the binding constants of propeller-like metal complexes of picolinaldehyde-2-pyridylhydrazone
Authors:	Carmona Vargas, Christian C. Aristizábal, Sandra L. Belalcázar, María I. D'Vries, Richard F. Chaur, Manuel N.
Keywords:	Binding constants Benesi-Hildebrand method Hydrazones Job's method Metal complexes
Issue Date:	13-Dec-2018
Publisher:	Elsevier S.A.
Abstract:	Herein, we determined the binding constants for transition metal complexes of Cu2+, Co2+, Fe2+, Ni2+, and Zn2+ ions formed with the ligand picolinaldehyde-2-pyridylhydrazone (PapyH) using the Benesi-Hildebrand method. Stoichiometry 2:1 (ligand: metal) was previously determined by the Job’s method and confirmed by single-crystal X-ray diffraction finding a propeller-like structure of the [Fe(Papy)2] compound. PapyH and the metal complexes were characterized by 1H NMR and UV-Vis spectroscopy, respectively. The Cu2+ complex exhibited the highest stability constant, which was confirmed by competitive reaction of different metal ions with the ligand PapyH.
URI:	https://repository.usc.edu.co/handle/20.500.12421/2653
ISSN:	00201693
Appears in Collections:	Artículos Científicos

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