Synthesis and Characterization of Cis-dioxomolybdenum(VI) Complex with an ONOtype Tridentate Schiff base Ligand and its Application as a Catalyst for Epoxidation of Olefinsin Water

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Mahmoudi, Hamed | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45931 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Bagherzadeh, Mojtaba
Abstract:
New dioxomolybdenum(VI) complex has been synthesized by reacting N-hydroxyphenyl-[5-(triphenylphosphonium)methyl]salicylideneamine chloride (PPh3-H2sap) as a water soluble ligand and [MoO2(acac)2] in ethanolic solution. The water soluble ligand (PPh3-H2sap) was prepared by reaction of 2-aminophenol with (3-formyl-4-hydroxybenzyl)triphenylphosphonium chloride as a water solublesalicylaldehyde derivative. The resulting complex with the formula [MoO2(PPh3-H2sap)(EtOH)] which contains an ethanol molecule in sixth site of coordination, was characterized by elemental analyses, 1H NMR,31P NMR, IR and UV-Vis spectroscopic studies. This complex was tested as a catalyst for the homogeneous epoxidation of olefins in water as a green solvent, using tert-butyl hydrogen peroxide (TBHP) as an oxidant. The catalytic system shows efficient reactivity in the olefins epoxidation reactions giving high yield and selectivity under atmospheric conditions, in most cases
Keywords:
Epoxide ; Catalytic Epoxidation ; Dioxomolybdenum Complexes ; Tertiary Butylhydroperoxide (TBHP) ; Water Soluble Ligands

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