Monooxo Complexes of Ruthenium(V) as Homogeneous Redox Catalysts for the Electrooxidation of Benzyl Alcohol

Kwok Yin Wong, Chi ming Che, Fred C. Anson

Research output: Journal article publicationJournal articleAcademic researchpeer-review

66 Citations (Scopus)

Abstract

The electrochemical behavior of three Ru(IV)-monooxo complexes, trans-[RuIV(TMC)O(X)]ClO4(TMC = 1,4,8,11-tetra-methyl-1,4,8,11-tetraazacyclotetradecane; X-= Cl-, NCO-, N3-), in acetonitrile is described. The formal potentials of the Ru(V)/Ru(IV) couples decrease in the order Cl-> NCO-> N3-. The electrochemically generated Ru(V)-monooxo complexes are active catalysts for the oxidation of benzyl alcohol to benzaldehyde. The rate of benzyl alcohol oxidation decreases in the same order as the formal potentials. The second-order rate constants for reaction between the Ru(V) complexes and benzyl alcohol were evaluated by rotating disk voltammetry. The values obtained were 2.1 X 102and 1.4 x 102M-1s-1for X-= Cl-and NCO-, respectively. The catalysts gradually lose their activity during the course of the electrooxidation of benzyl alcohol because of what appears to be decomposition of the catalysts during the period that they are in the Ru(V) oxidation state.
Original languageEnglish
Pages (from-to)737-741
Number of pages5
JournalInorganic Chemistry
Volume26
Issue number5
DOIs
Publication statusPublished - 1 Mar 1987
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this