Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 71, Issue 3, Pages 884-891Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2008.02.006
Keywords
Binucleating ligands; Binuclear ruthenium(III) complexes; Synthesis; Characterization; Catalytic oxidation
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Funding
- Council of Scientific and Industrial Research (CSIR), New Delhi [01(1725)/021EMR-11]
- Senior Research Fellowship (SRF)
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An interesting series of binuclear ruthenium(III) Schiff base complexes bearing bis-salophen/bis-naphophen units of the general composition [(EPh3)(X)Ru-L-Ru(X)(EPh3)] (where E=P or As X=Cl or Br L=binucleating dianionic tetradentate ligands) have been synthesized and characterized by analytical (elemental analysis, magnetic susceptibility measurements), spectral (FT-IR, UV-vis and EPR) and electrochemical methods. These ruthenium(III) complexes have two N2O2 metal binding sites, which are linked to each other with a biphenyl bridge and acts as potential catalyst for oxidation of wide range of primary and secondary alcohols to corresponding aldehydes or ketones with moderate to high conversion in the presence of N-methylmorpholine-N-oxide (NMO). The formation of high-valent Ru-v = O species as a catalytic active intermediate is proposed for the catalytic processes. (C) 2008 Published by Elsevier B.V.
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