Aims: To achieve catalytic performance for the oxidation of alcohols using
Ruthenium(III) metal complexes as a catalyst.
Background: Chitosan is a potential candidate, which enables the synthesis of transition metal
complexes from its corresponding bidentate ligands.
Objective: The chemical modification was performed on a chitosan molecule with suitable
Methods: The oxidation of alcohols was performed using ruthenium metal complexes as a catalyst
with pyridinium chlorochromate (PCC) as an oxidant and dichloromethane as a solvent. To a
solution of alcohol (2 mmol) and dichloromethane (25 mmol), pyridinium chlorochromate (3
mmol), and ruthenium(III) complexes (0.01 mmol) were added. The solution was stirred for 12 h at
room temperature. At the required time, the aldehyde/ketone was extracted with n-hexane. The nhexane
was then analyzed by GC.
Results: The ruthenium(III) complexes derived from modified chitosan Schiff bidentate ligands have
resulted in good catalytic performance for the oxidation of alcohols under optimized conditions.
Conclusion: The enhanced catalytic activities of ruthenium(III) complexes were due to the
presence of electron-donating groups in the Schiff base ligand.