Transition metal complexes of N,N-dimethylthreonine: Stability and UV/Vis spectra |
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| Authors: | B. Blagović N. Paulić N. Raos V. Simeon |
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| Affiliation: | (1) Medical Faculty, University of Rijeka, HR-51000 Rijeka, Croatia;(2) Institute for Medical Research and Occupational Health, University of Zagreb, HR-41001 Zagreb, Croatia;(3) Laboratory of Physical Chemistry, Faculty of Science, University of Zagreb, HR-41001 Zagreb, Croatia |
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| Abstract: | Summary Acidity (dehydronation) constants of N,N-dimethylthreonine (DMT) and stability constants of its complexes with Cu+2, Ni+2, and Co+2 were determined in aqueous solution by means of potentiometric titration. UV/Vis spectra were also taken during the titration. It is suggested thatDMT acts as a bidentate ligand toward copper(II) by engaging either (a) amino and carboxyl groups (in [Cu(DMT)] and [Cu(DMT)2]), or, (b) upon dehydronation, amino and hydroxyl groups (in [Cu(DMT)H–1], [Cu(DMT)2H–1], and [Cu(DMT)2H–2]). It is suggested that the coordination in threoninato andallo-threoninato complexes is similar to that described under (a).Based upon Master of Science thesis submitted to the University of Zagreb, Croatia byB. Blagovi |
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| Keywords: | Copper(II), aminoacidato complexes N,N-dimethylthreonine, complexes with Cu(II) Speciation Stability constants UV/Vis spectra |
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