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Synthesis of Mo-Complex with An Ionic Salen Ligand and Its Application in Catalytic Epoxidation of Olefins and Sulfide Oxidation

Bagheri Sereshky, Fahimeh | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44947 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Bagherzadeh, Mojtaba
  7. Abstract:
  8. In this project synthesis and characterization of a novel dioxomolybdenum(VI), with tetradentates Schiff base ligand which was soluble in water. The first step of complex synthesis was chloromethylation of salicylaldehyde and the second step was the reaction with the pyridine. After that salen ligand will be synthesized by reaction with ethylene diamine. In the presence of Mo(acac)₂(VI) the final product will be synthesized. The complex was characterized by spectroscopic methods such as UV, NMR, FT-IR and CHN. The synthetized complex was studied for olefin (aliphatic and aromatic) epoxidation as well as sulfide oxidation. It was more active in aliphatic olefins epoxidation than sulfide oxidation. Within four hours, this complex shown great activity and selectivity towards aliphatic and aromatic substrate epoxidation but less activity towards sulfide oxidation. The best result was for cyclooctene epoxidation with conversion of 97% and methyl phenyl sulfide oxidation with conversion of 68% . The observations showed that in the presents of water in this epoxidation media gave rise to dropping in the amount of the product to zero, while using the chlorinated solvents accelerate the epoxidation
  9. Keywords:
  10. Olefins Epoxidation ; Dioxomolybdenum Complexes ; Sulfide Oxidation ; Tetradentate Schifbase Ligands ; Tertiary Butylhydroperoxide (TBHP)

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