Summary
Complex formation in iron(III)-L-alanine solutions was studied by emf glass electrode and spectrophotometric measurements, in 0.5 mol dm −3 (Na)NO3 medium, at 25 ° C. In the concentration range 0.5 ⩽ [Fe]0 ⩽ 20.0, 5.0 ⩽ [Ala]0 ⩽ 1000.0 (mmol dm−3) and 1.0 ⩽ -log [H+] ⩽ 3.5; {[Ala]/[Fe] = 10:1-100:1| the equilibria in the title system were explained by the model including the species FeHL, FeL, Fe(OH)L, Fe2(OH)2L2 (where HL denotes L-alanine) and several hydrolytic products. The stability constants of complexes are given. The mechanism of formation and structure of complexes in solution is proposed.
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Abbreviations
- Ala:
-
alaninate ion
- HAla:
-
alanine (zwitterion)
- AlaH:
-
alanine (neutral)
- H2Ala+ :
-
alanine cation
References
P. Djurdjevic, Transition Met. Chem., 15, 345 (1990).
D. D. Perrin, J. Chem. Soc., 3125 (1958).
V. I. Shcherbakova, O. B. Pankratova and G. B. Zhaiykova, Vestnik Leningr. Univ., Fiz. Khim. Ser. 4., 1, 97 (1988).
R. C. Kapoor and K. C. K. Mathur, J. Polarog. Soc., 13, 86 (1967).
L. G. Sillen and A. E. Martell, Stability Constants of Metal Ion Complexes, Sp. Publ. No. 25, The Chemical Society, London, 1971.
P. Djurdjevic, J. Serbian Chem. Soc., 56, 601 (1991).
P. May and D. Williams, In D. Leggett (Ed.) Magec. A Program for the Definitive Calibration of the Glass Electrode. Computational Methods for the Determination of Formation Constants, Plenum Press, London, 1985, pp. 37–70.
P. Djurdjevic and R. Jelic, Z. Anorg. Allg. Chem., 575, 217 (1989).
P. Gans, A. Sabatini and A. Vacca, J. Chem. Soc. Dalton Trans., 1195 (1985).
D. J. Leggett, In D. Leggett (Ed.) Squad. Stability Quotients from Absorbance Data. Computational Methods for the Determination of Formation Constants, Plenum Press, London, 1985, pp. 159–220.
J. Costa Pessoa, L. F. Vilas Boas, R. D. Gillard and R. J. Lancashire, Polyhedron, 7, 1245 (1988).
A. E. Martell and R. J. Motekaitis, The Determination and Use of Stability Constants, VCH, Weinheim, 1988, pp. 197–212.
I. Lindquist and R. Rosenstein, Acta Chem. Scand., 14, 1228 (1960).
R. B. Martin, Met. Ions Biol. Syst., 9, 1 (1979).
L. Sommer and K. Pliska, Coll. Czechslov. Chem. Commun., 26, 2754 (1961).
B. P. Nikol'skii, V. V. Pal'chevskii and V. I. Shcherbakova, in B. P. Nikol'skii and V. V. Pal'chevskii (Eds.), Sostayanie Fe(II) i Fe(III) v vodnyh rastvorah oksiuksusnoi, aminouksusnoi i akrilovoi kislot, Vzaimodeistviya v rastvorah okislitel' no-vosstanovitel'nyh sistem, LGU, Leningrad, 1977, pp. 57–64.
C. F. Baes and R. E. Mesmer, The Hydrolysis of Cations, Wiley, NY, 1976, pp. 229–237.
V. I. Shcherbakova and O. B. Pankratova, Koord. khim., 16, 1011 (1990) and refs therein.
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Djurdjević, P., Jelić, R. Complex formation equilibria in iron(III)-L-alanine system. Transition Met Chem 18, 457–461 (1993). https://doi.org/10.1007/BF00136603
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DOI: https://doi.org/10.1007/BF00136603