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Bari, S.E.; Amorebieta, V.T.; Gutiérrez, M.M.; Olabe, J.A.; Doctorovich, F. "Disproportionation of hydroxylamine by water-soluble iron(III) porphyrinate compounds" (2010) Journal of Inorganic Biochemistry. 104(1):30-36
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Abstract:

The reactions of hydroxylamine (HA) with several water-soluble iron(III) porphyrinate compounds, namely iron(III) meso-tetrakis-(N-ethylpyridinium-2yl)-porphyrinate ([FeIII(TEPyP)]5+), iron(III) meso-tetrakis-(4-sulphonatophenyl)-porphyrinate ([FeIII(TPPS)]3-), and microperoxidase 11 ([FeIII(MP11)]) were studied for different [FeIII(Porph)]/[HA] ratios, under anaerobic conditions at neutral pH. Efficient catalytic processes leading to the disproportionation of HA by these iron(III) porphyrinates were evidenced for the first time. As a common feature, only N2 and N2O were found as gaseous, nitrogen-containing oxidation products, while NH3 was the unique reduced species detected. Different N2/N2O ratios obtained with these three porphyrinates strongly suggest distinctive mechanistic scenarios: while [FeIII(TEPyP)]5+ and [FeIII(MP11)] formed unknown steady-state porphyrinic intermediates in the presence of HA, [FeIII(TPPS)]3- led to the well characterized soluble intermediate, [FeII(TPPS)NO]4-. Free-radical formation was only evidenced for [FeIII(TEPyP)]5+, as a consequence of a metal centered reduction. We discuss the catalytic pathways of HA disproportionation on the basis of the distribution of gaseous products, free radicals formation, the nature of porphyrinic intermediates, the FeII/FeIII redox potential, the coordinating capabilities of each complex, and the kinetic analysis. The absence of NO2- revealed either that no HAO-like activity was operative under our reaction conditions, or that NO2-, if formed, was consumed in the reaction milieu. © 2009 Elsevier Inc. All rights reserved.

Registro:

Documento: Artículo
Título:Disproportionation of hydroxylamine by water-soluble iron(III) porphyrinate compounds
Autor:Bari, S.E.; Amorebieta, V.T.; Gutiérrez, M.M.; Olabe, J.A.; Doctorovich, F.
Filiación:Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE, CONICET, Pabellón 2, Buenos Aires, C1428EHA, Argentina
Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de Mar del Plata, Funes y Roca, Mar del Plata B7602AYL, Argentina
Palabras clave:Catalysis; Hydroxylamine; Iron(III) microperoxidase 11; Iron(III) porphyrinates; Nitrogen metabolism; ammonia; ferric ion; ferrous ion; free radical; hydroxylamine; iron; nitrogen; nitrous oxide; peroxidase; porphyrin derivative; anaerobic metabolism; article; catalysis; chemical reaction; controlled study; kinetics; oxidation reduction potential; pH; Catalysis; Hydroxylamine; Metalloporphyrins; Nitric Oxide; Peroxidases; Pyridines; Solubility; Water
Año:2010
Volumen:104
Número:1
Página de inicio:30
Página de fin:36
DOI: http://dx.doi.org/10.1016/j.jinorgbio.2009.09.024
Título revista:Journal of Inorganic Biochemistry
Título revista abreviado:J. Inorg. Biochem.
ISSN:01620134
CODEN:JIBID
CAS:ammonia, 14798-03-9, 51847-23-5, 7664-41-7; ferric ion, 20074-52-6; ferrous ion, 15438-31-0; hydroxylamine, 7803-49-8; iron, 14093-02-8, 53858-86-9, 7439-89-6; nitrogen, 7727-37-9; nitrous oxide, 10024-97-2; peroxidase, 9003-99-0; Hydroxylamine, 7803-49-8; Metalloporphyrins; Nitric Oxide, 10102-43-9; Peroxidases, 1.11.1.-; Pyridines; Water, 7732-18-5; iron(III)-tetrakis(p-sulfonatophenyl)porphyrin; microperoxidase, 1.11.1.-
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01620134_v104_n1_p30_Bari

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Citas:

---------- APA ----------
Bari, S.E., Amorebieta, V.T., Gutiérrez, M.M., Olabe, J.A. & Doctorovich, F. (2010) . Disproportionation of hydroxylamine by water-soluble iron(III) porphyrinate compounds. Journal of Inorganic Biochemistry, 104(1), 30-36.
http://dx.doi.org/10.1016/j.jinorgbio.2009.09.024
---------- CHICAGO ----------
Bari, S.E., Amorebieta, V.T., Gutiérrez, M.M., Olabe, J.A., Doctorovich, F. "Disproportionation of hydroxylamine by water-soluble iron(III) porphyrinate compounds" . Journal of Inorganic Biochemistry 104, no. 1 (2010) : 30-36.
http://dx.doi.org/10.1016/j.jinorgbio.2009.09.024
---------- MLA ----------
Bari, S.E., Amorebieta, V.T., Gutiérrez, M.M., Olabe, J.A., Doctorovich, F. "Disproportionation of hydroxylamine by water-soluble iron(III) porphyrinate compounds" . Journal of Inorganic Biochemistry, vol. 104, no. 1, 2010, pp. 30-36.
http://dx.doi.org/10.1016/j.jinorgbio.2009.09.024
---------- VANCOUVER ----------
Bari, S.E., Amorebieta, V.T., Gutiérrez, M.M., Olabe, J.A., Doctorovich, F. Disproportionation of hydroxylamine by water-soluble iron(III) porphyrinate compounds. J. Inorg. Biochem. 2010;104(1):30-36.
http://dx.doi.org/10.1016/j.jinorgbio.2009.09.024