Mechanism of iron(III) complex formation. Activation volumes for the complexation of the iron(III) ion with thiocyanate ion and acetohydroxamic acid

Shigenobu Funahashi, Koji Ishihara, Motoharu Tanaka

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Abstract

Activation volumes (ΔV) for the complexation of the iron(III) ion with thiocyanate (SCN-) and acetohydroxamic acid (Hahx) were determined by a high-pressure stopped-flow technique. The values of ΔV for reaction of Fe3+ are -6.1 ± 1.0 cm3 mol-1 for SCN- and -10.0 ± 1.4 cm3 mol-1 for Hahx, whereas the ΔV values of the FeOH2+ ion are 8.5 ± 1.2 cm3 mol-1 for SCN- and 7.7 ± 0.6 cm3 mol-1 for Hahx. Complexation of FeOH2+ is dissociatively activated but that of Fe3+ associatively. No apparent parallel relationship is observed between ΔV and corresponding ΔS values.

Original languageEnglish
Pages (from-to)2070-2073
Number of pages4
JournalInorganic Chemistry
Volume22
Issue number14
Publication statusPublished - 1983
Externally publishedYes

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Complexation
Iron
Chemical activation
activation
Ions
iron
acids
ions
acetohydroxamic acid
thiocyanate

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Mechanism of iron(III) complex formation. Activation volumes for the complexation of the iron(III) ion with thiocyanate ion and acetohydroxamic acid. / Funahashi, Shigenobu; Ishihara, Koji; Tanaka, Motoharu.

In: Inorganic Chemistry, Vol. 22, No. 14, 1983, p. 2070-2073.

Research output: Contribution to journalArticle

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