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New molybdenum(VI) complex with ONS-donor thiosemicarbazone ligand: Preparation, structural characterization, and catalytic applications in olefin epoxidation

Moradi Shoeili, Z ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.inoche.2012.10.016
  3. Publisher: 2013
  4. Abstract:
  5. New dioxomolybdenum(VI) complex was prepared by reacting 1-(2,4-dihydroxybenzylidene)-N-methyl-N-phenylthiosemicarbazone (H2L) as ligand and [MoO2(acac)2] in acetonitrile solution. The doubly deprotonated ligand is coordinated to molybdenum through sulfur atom, hydrazinic nitrogen atom and phenolic oxygen atom. The resulting complex with the formula [MoO2L(CH3CN)] which contains an acetonitrile molecule in sixth site of coordination, was characterized by elemental analyses, 1H NMR, IR and electronic spectroscopic studies and single crystal X-ray diffraction analysis. This complex was tested as a catalyst for the homogeneous epoxidation of olefins using tert-butyl hydrogen peroxide (TBHP) as an oxidant. The catalyst shows efficient reactivity in the olefins epoxidation reactions giving high yield and selectivity under atmospheric conditions, in most cases
  6. Keywords:
  7. Dioxomolybdenum(VI) complex ; Olefin epoxidation ; Thiosemicarbazone
  8. Source: Inorganic Chemistry Communications ; Volume 27 , 2013 , Pages 26-30 ; 13877003 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S138770031200487X