Abstract
The electrochemical behavior of three Ru(IV)-monooxo complexes, trans-(Ru/sup IV/(TMC)O(X))ClO/sub 4/ (TMC = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane; X/sup -/ = Cl/sup -/, NCO/sup -/, N/sub 3//sup -/), in acetonitrile is described. The formal potentials of the Ru(V)/Ru(IV) couples decrease in the order Cl/sup -/ > NCO/sup -/ > N/sub 3//sup -/. 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 10/sup 2/ and 1.4 x 10/sup 2/ M/sup -1/ s/sup -1/ for X/sup -/ = Cl/sup -/ and NCO/sup -/, 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 periods that they are in the Ru(V) oxidation state. 15 references, 4 figures, 4 tables.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
