Binuclear ruthenium(III) Schiff base complexes bearing N(4)O(4) donors and their catalytic oxidation of alcohols.
An interesting series of binuclear ruthenium(III) Schiff base complexes bearing bis-salophen/bis-naphophen units of the general composition [(EPh(3))(X)Ru-L-Ru(X)(EPh(3))] (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 N(2)O(2) 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.
Venkatachalam
G
G
School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, India.
Raja
N
N
Pandiarajan
D
D
Ramesh
R
R
D000438:Alcohols / Q000737:chemistry; D004563:Electrochemistry; D055590:Electromagnetic Phenomena; D004578:Electron Spin Resonance Spectroscopy; D008280:Magnetics; D015394:Molecular Structure; D010084:Oxidation-Reduction; D017975:Ruthenium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012459:Salicylates / Q000138:chemical synthesis / Q000737:chemistry; D012545:Schiff Bases / Q000138:chemical synthesis / Q000737:chemistry*; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
D000438:Alcohols; D017975:Ruthenium Compounds; D012459:Salicylates; D012545:Schiff Bases; C090416:salophen