The formation reactions of complexes of N-tosylglycine with the copper(I1) ion were investigated by polarographicmeasurements in aqueous solution at different ligand concentrations and pH values to identify the number and type of complexspecies present in aqueous solution, to establish the equilibria in which they are involved, and to calculate their stability constants.A polarographic, pH-metric, and spectrophotometric study of the ligand was also performed to determine its pK, values (3.5and 11.6). Until pH 5 no formation of complexes is observed, above this pH different complexes were identified as a function metal/ligand molar ratio. Simple binary species and hydroxylated complexes were recognized.
The role of the tosyl group on the coordination ability of N-protected amino acids. 2.Behavior of the copper(II) ion-N-tosylglycinate system in aqueous solution / Antolini, Luciano; L. P., Battaglia; Gavioli, Giovanna; Corradi, Anna; Grandi, Giulia; Marcotrigiano, Giuseppe Onofrio; Menabue, Ledi; Pellacani, Gian Carlo. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - STAMPA. - 105:(1983), pp. 4333-4337. [10.1021/ja00351a035]
The role of the tosyl group on the coordination ability of N-protected amino acids. 2.Behavior of the copper(II) ion-N-tosylglycinate system in aqueous solution.
ANTOLINI, Luciano;GAVIOLI, Giovanna;CORRADI, Anna;GRANDI, Giulia;MARCOTRIGIANO, Giuseppe Onofrio;MENABUE, Ledi;PELLACANI, Gian Carlo
1983
Abstract
The formation reactions of complexes of N-tosylglycine with the copper(I1) ion were investigated by polarographicmeasurements in aqueous solution at different ligand concentrations and pH values to identify the number and type of complexspecies present in aqueous solution, to establish the equilibria in which they are involved, and to calculate their stability constants.A polarographic, pH-metric, and spectrophotometric study of the ligand was also performed to determine its pK, values (3.5and 11.6). Until pH 5 no formation of complexes is observed, above this pH different complexes were identified as a function metal/ligand molar ratio. Simple binary species and hydroxylated complexes were recognized.
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