Solvent Control of Oxidation State Distribution and Electronic Delocalization in an Osmium-Ruthenium, Mixed-Metal Dimer

Joseph T. Hupp, Gregory A. Neyhart, Thomas J. Meyer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

In mixed-valence dimers the position and extent of delocalization of the odd electron depends on the metals and on the bridging and nonbridging ligands. We report here the preparation of the mixed-metal dimer [(bpy)2(Cl)OsII(pz)RuI1(NH3)5]3+(bpy is 2,2'-bipyridine; pz is pyrazine) in which the metal–ligand combinations at the two sites lead to redox potentials for the OsIII/IIand RuIII/IIcouples which are nearly of the same magnitude. However, because of a considerable difference in the sensitivity of the potentials of the two couples to solvent,4 we have been able to demonstrate that in the mixed-valence form of the dimer, intramolecular electron transfer can be induced by changes in the solvent. Perhaps more interestingly, we also find that variations in solvent appear to affect the extent of delocalization of the odd electron.

Original languageEnglish (US)
Pages (from-to)5349-5350
Number of pages2
JournalJournal of the American Chemical Society
Volume108
Issue number17
DOIs
StatePublished - Jan 1 1986

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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