Synthesis and Characterization of Cis-dioxomolybdenum(VI) Complex with an ONO Type Tridentate Schiff base Ligand and its Application as Catalyst for Epoxidation of Olefins

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سنتز و شناسایی کمپلکس سیس-دی اکسو مولیبدن(VI) با شیف باز سه دندانه ای نوع ONO و کاربرد آن به عنوان کاتالیزور برای اپوکسایش الفین ها

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49662 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Bagherzadeh, Mojtaba
Abstract:
A new dioxomolybdenum(VI) complex, (Cis-[MoO2(L)])n, has been synthesized by reacting 4-bromo-2-((2-hydroxy-5-methylphenylimino)methyl)phenol as a ligand and [MoO2(acac)2] in methanolic solution. For characterization and structure determination of the synthesized complex, different techniques were performed such as elemental analyses, 1H NMR, IR, UV-Vis and X-ray crystallography. The complex was tested as a catalyst for the homogeneous epoxidation of olefins, using tert-butyl hydperoxide (TBHP) as an oxidant. The catalytic system showed high yield, selectivity and turnover number in olefin epoxidation reactions under atmospheric conditions. For example, when the molar ratio of catalyst, substrate and TBHP is 0.00023 : 1 : 2, the conversion and turnover number are 93% and 4043 respectively in 2 h
Keywords:
Tridentate Schiffbase Ligands ; Homogeneous Catalyst ; Olefins Epoxidation ; Tertiary Butylhydroperoxide (TBHP) ; Molybdenum Schiffbase Complex ; Dioxomolybdenum Complexes ; Cis-dioxomolybdenum (Vl)Sehiff Base Complex

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