869549-67-7Relevant articles and documents
Synthesis, spectra, redox property and catalytic activity of ruthenium(III) Schiff base complexes
Venkatachalam,Maheswaran,Ramesh
, p. 705 - 709 (2007/10/03)
A series of ruthenium(III) complexes of the type [RuX2(EPh 3)2(L)] (where E= P or As, X= Cl or Br; L = bidentate Schiff bases) have been synthesized and characterized on the basis of analytical (elemental analysis, magnetic susceptibility) and spectral methods (FT-IR, UV-vis, EPR). EPR spectra of the powdered samples exhibit three lines with different 'g' values indicating a rhombic distortion in these complexes. Cyclic voltammogram of the complexes displays one reversible oxidation (Ru IV/RuIII) and two reversible reduction peaks (Ru III/RuII, RuII/RuI) with ΔEP=60-80 mV suggesting one electron transfer process. These complexes effectively catalyze the oxidation of primary alcohols to their corresponding aldehydes up to 91.5% in the presence of N-methylmorpholine-N- oxide (NMO) as co-oxidant. The formation of high-valent Run+2=O species as catalytic intermediate is proposed for the catalytic processes.