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

Research output: Contribution to journalArticle

50 Citations (Scopus)

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 Fe associatively. No apparent parallel relationship is observed between ΔV‡ and corresponding AS values.

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

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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