Alumina-supported Mn(II), Co(II), Ni(II) and Cu(II) N,N-bis(salicylidene)-2,2-dimethylpropane-1,3-diamine complexes: Synthesis, characterization and catalytic oxidation of cyclohexene with tert-butylhydroperoxide and hydrogen peroxide

作者：Salavati Niasari Masoud^*; Hassani Kabutarkhani Marzieh; Davar Fatemeh

来源：Catalysis Communications, 2006, 7(12): 955-962.

DOI：10.1016/j.catcom.2006.04.005

• Schiff-base
• alumina
• THBP
• H2O2
• oxidation
• cyclohexene

New square-planar manganese(II), copper(II), nickel(IT) and cobalt(IT) complexes of a tetradentate Schiff-base ligand "N,N-bis(salicylidene)-2,2-dimethylpropane-1,3-diamine, H-2[salpnMe(2)]" have been prepared and characterized by elemental analyses, IR, U-V-Vis, conductometric and magnetic measurements. The results suggest that the symmetrical Schiff-base is a bivalent anion with tetradentate N2O2 donors derived from the phenolic oxygen and azomethine nitrogen. The formulae was found to be [M(salpnMe2)] for the 1:1 nonelectrolytic complexes. Alumina-supported metal complexes (ASMC; [M(salpnMe2)/Al2O3]) catalyze the oxidation of cyclohexene with tert-buthylhydroperoxide (TBHP) and hydrogen peroxide. Oxidation of cyclohexene with TBHP gave 2-cyclohexene-1-one, 2-cyclohexene-1-ol and 1-(tert-butylperoxy)-2-cyclohexene whereas, oxidation with H2O2 resulted in the formation of cyclohexene oxide and cyclohexene-1,2-diol. Manganese(11) complex supported on alumina "[Mn(salpnMe2]-Al2O3" shows significantly higher catalytic activity than other catalysts.

• 出版日期2006-12