Iron(III) complexation by hydroxyurea in acidie aqueous perchlorate solution

Bedrica, A.
Biruš, M.
Kujundžić, N.
Pribanić, M.

Publication date

January 1988

Abstract

Equilibrium and kinetic studies were performed to investigate the complexation of aqueous high spin iron(III) by hydroxyurea H2NC(O)NH(OH) in acidie solutions at 25 <c and I = 2.0 mol dm? (maintained by NaC104). Complexation has been interpreted in terms of coordination of the N-O oxygen atom and the NH2 nitrogen atom of the ligand to the iron(III) ion with concomitant loss of a proton yielding the complex of the molar ratio 1 :1. The equilibrium quotient for the formation of mono(hydroxyureato)iron (III) complex is found to be Kl = 1.4. The kinetic results suggest a parallel path mechanism involving substitution on Fe(H20)63+ and Fe(H20l50H2+ by the hydroxyurea, HU: Fe (HzO)63+ + HU ;;= Fe (HzO)4 U2++ H+ Fe (H20)s (OH)2++ HU;;=' Fe (HzO)4 ...

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Iron(III) complexation by hydroxyurea in acidie aqueous perchlorate solution

Abstract

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Iron(III) complexation by hydroxyurea in acidie aqueous perchlorate solution

Abstract

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