A pH-metric and 13C NMR study has been made of the proton complexes of L-α-alaninehydroxamic acid and β-alaninehydroxamic acid at 25 °C and I= 0.2 mol dm–3 and 1.0 mol dm–3(KCl), to determine the macroscopic and microscopic dissocation constants of the ligand. It has been found that the NH3+ group is more acidic than the NHOH group for the α-derivative, while the acidity sequence is the opposite for the β-derivative.
E. Farkas, T. Kiss and B. Kurzak, J. Chem. Soc., Perkin Trans. 2, 1990, 1255 DOI: 10.1039/P29900001255
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