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Synthesis, Characterization, and Catalytic Performance in Oxidation of Styrene and α-Methyl Styrene of a Nickel(II) Complex Derived from a Schiff Base Ligand

Authors

  • Dr. Felora Heshmatpour,

    Corresponding author
    1. Department of Chemistry, K. N. Toosi University of Technology, P.O. Box 16315–1618, Tehran 15418, Iran
    • Department of Chemistry, K. N. Toosi University of Technology, P.O. Box 16315–1618, Tehran 15418, Iran, Fax: +98-21-22853650
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  • Dr. Saeed Rayati,

    Corresponding author
    1. Department of Chemistry, K. N. Toosi University of Technology, P.O. Box 16315–1618, Tehran 15418, Iran
    • Department of Chemistry, K. N. Toosi University of Technology, P.O. Box 16315–1618, Tehran 15418, Iran
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  • Mona Afghan Hajiabbas,

    1. Department of Chemistry, K. N. Toosi University of Technology, P.O. Box 16315–1618, Tehran 15418, Iran
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  • Bernhard Neumüller

    1. Fachbereich Chemie, Universität Marburg, Hans-Meerwein-Straße, 35032 Marburg, Germany
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Abstract

A tetrahedrally-distorted square-planar nickel(II) complex of tetradentate Schiff base ligand derived from 2-hydroxypropiophenone and 2,2′-dimethylpropandiamine [bis(2-hydroxypropiophenone)2,2′-dimethylpropylenediimine] (H2L) was prepared and used as catalyst for oxidation of styrene and α-methyl styrene with tert-butylhydroperoxide (TBHP). Oxidation of styrene with TBHP gave benzaldehyde and styrene oxide, but in the case of α-methylstyrene a mixture of α-methylstyrene oxide and acetophenone was obtained. The structure of nickel(II) complex (NiL) was determined by X-ray crystallography. Crystal data for NiL at –173 °C: orthorhombic, space group P212121, a = 907.7(1), b = 1289.4(1), c = 1752.4(1) pm, Z = 4, R1 = 0.0454.

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