The chemistry of iron in biosystems-V. Study of complex formation between iron(III) and tartaric acid in alkaline aqueous solutions

V. Salvado; X. Ribas; M. Valiente

doi:10.1016/0039-9140(92)80053-G

The chemistry of iron in biosystems-V. Study of complex formation between iron(III) and tartaric acid in alkaline aqueous solutions

V. Salvado, X. Ribas, M. Valiente

Department of Chemistry

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8 Citations (Scopus)

Abstract

Complex formation between Fe(III) and tartaric acid (H2L) has been studied in O.5M NaNO3 medium at 25° by potentiometry at pH 4.5-11. The following complex species and corresponding values of the stability constants (charges omitted) are proposed: 2Fe + 2L + 5H2O → Fe2(OH)5L2 + 5H+; log* β-522 = 4.95 Fe + L + 3H2O → Fe(OH)3L + 3H+; log* β-311 = -1.55 Fe + L + 5H2O → Fe(OH)5L + 5H+; log* β-511 = -21.2 These results are in good agreement with those reported for this system in acid. The results may be presented as the degeneration of the "core + link" mechanism observed in the acidic zone. Structures are suggested for the complex species formed. © 1992.

Original language	English
Pages (from-to)	73-76
Journal	Talanta
Volume	39
Issue number	1
DOIs	https://doi.org/10.1016/0039-9140(92)80053-G
Publication status	Published - 1 Jan 1992

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title = "The chemistry of iron in biosystems-V. Study of complex formation between iron(III) and tartaric acid in alkaline aqueous solutions",

abstract = "Complex formation between Fe(III) and tartaric acid (H2L) has been studied in O.5M NaNO3 medium at 25° by potentiometry at pH 4.5-11. The following complex species and corresponding values of the stability constants (charges omitted) are proposed: 2Fe + 2L + 5H2O → Fe2(OH)5L2 + 5H+; log* β-522 = 4.95 Fe + L + 3H2O → Fe(OH)3L + 3H+; log* β-311 = -1.55 Fe + L + 5H2O → Fe(OH)5L + 5H+; log* β-511 = -21.2 These results are in good agreement with those reported for this system in acid. The results may be presented as the degeneration of the {"}core + link{"} mechanism observed in the acidic zone. Structures are suggested for the complex species formed. {\textcopyright} 1992.",

author = "V. Salvado and X. Ribas and M. Valiente",

year = "1992",

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doi = "10.1016/0039-9140(92)80053-G",

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T1 - The chemistry of iron in biosystems-V. Study of complex formation between iron(III) and tartaric acid in alkaline aqueous solutions

AU - Salvado, V.

AU - Ribas, X.

AU - Valiente, M.

PY - 1992/1/1

Y1 - 1992/1/1

N2 - Complex formation between Fe(III) and tartaric acid (H2L) has been studied in O.5M NaNO3 medium at 25° by potentiometry at pH 4.5-11. The following complex species and corresponding values of the stability constants (charges omitted) are proposed: 2Fe + 2L + 5H2O → Fe2(OH)5L2 + 5H+; log* β-522 = 4.95 Fe + L + 3H2O → Fe(OH)3L + 3H+; log* β-311 = -1.55 Fe + L + 5H2O → Fe(OH)5L + 5H+; log* β-511 = -21.2 These results are in good agreement with those reported for this system in acid. The results may be presented as the degeneration of the "core + link" mechanism observed in the acidic zone. Structures are suggested for the complex species formed. © 1992.

AB - Complex formation between Fe(III) and tartaric acid (H2L) has been studied in O.5M NaNO3 medium at 25° by potentiometry at pH 4.5-11. The following complex species and corresponding values of the stability constants (charges omitted) are proposed: 2Fe + 2L + 5H2O → Fe2(OH)5L2 + 5H+; log* β-522 = 4.95 Fe + L + 3H2O → Fe(OH)3L + 3H+; log* β-311 = -1.55 Fe + L + 5H2O → Fe(OH)5L + 5H+; log* β-511 = -21.2 These results are in good agreement with those reported for this system in acid. The results may be presented as the degeneration of the "core + link" mechanism observed in the acidic zone. Structures are suggested for the complex species formed. © 1992.

U2 - 10.1016/0039-9140(92)80053-G

DO - 10.1016/0039-9140(92)80053-G

M3 - Article

VL - 39

SP - 73

EP - 76

JO - Talanta

JF - Talanta

SN - 0039-9140

IS - 1

ER -

The chemistry of iron in biosystems-V. Study of complex formation between iron(III) and tartaric acid in alkaline aqueous solutions

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