Transition metal Schiff-base complexes chemically anchored on Y-zeolite: their preparation and catalytic epoxidation of 1-octene in the suspension and phase boundary systems

Abstract

Abstract Synthesis procedures are described for the complexes [M(L-H)(AcO)(H 2 O) 2 ] (M(II) = Mn, Ni), [M(L-H)Cl n (H 2 O) m ] (M = Fe(III), n = 2, m = 2; M = Pd(II), n = 1, m = 1; M = Ag(I), n = 0, m = 2) and [M(L-H) 2 (H 2 O) n ] (M = Co(II), n = 2; M = Cu(II), [WO 2 ] 2+ , n = 0) where L is the Schiff-base derived from salicylaldehyde and 3-aminopropyltriethoxysaline (APTSsal) that is chemically anchored on Y-zeolite. Characterization of these complexes was accomplished by elemental analyses, infrared and diffuse-reflectance spectra and magnetic moment. The anchored Schiff-bases imposed stable planar coordination sphere on the metal ions, allowing epoxidation of 1-octene in the axial position in the presence of molecular oxygen. The epoxidation of 1-octene was also achieved by employing the partly modified Y-zeolite with n -octadecyltrichlorosilane (OTS) Schiff-base complexes in the presence of 30% H 2 O 2 under a phase-boundary system.