Effect of anions on redox reactions. 1. Chromium(II) reduction of bis(pentane-2, 4-dionato)(ethylenediamine)cobalt(III) in the presence of chloride ions

Nita A. Lewis, Ananda M. Ray

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The effect of chloride ions on the Cr(II) reduction of [Co(en)(ptdn)2]+ was studied. The rate for the outer-sphere pathway was twice that of the uncatalyzed reaction (k(25.0°C) = (4.86 ± 0.04) × 10-3 M-1 s-1, ΔH = 17 ± 1 kcal mol-1, ΔS = -13 ± 3 eu) whereas the rates for the inner-sphere pathways were practically unaffected. The kinetic parameters for the monobridged pathway were k(25.0°C) = (2.97 ± 0.02) × 10-3 M-1 s-1, and those of the dibridged path were k(25.0 °C) = (1.46 ± 0.02) × 10-3 M-1 s-1, ΔH = 13 ± 1 kcal mol-1, and ΔS = -27 ± 1 eu. No chloride could be detected in the inner-sphere electron-transfer products.

Original languageEnglish (US)
Pages (from-to)3649-3653
Number of pages5
JournalInorganic Chemistry
Volume23
Issue number22
DOIs
StatePublished - Mar 1984
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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