2018
DOI: 10.1002/aoc.4459
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New magnetic supported hydrazone Schiff base dioxomolybdenum (VI) complex: An efficient nanocatalyst for epoxidation of cyclooctene and norbornene

Abstract: A new dioxomolybdenum (VI) complex with tridentate hydrazone Schiff base ligand (H2L) derived from 2‐hydroxy‐5‐nitrobenzaldehyde and benzhydrazide was synthesized and designated as [MoO2L (DMF)]·2H2O. The Fe3O4@SiO2‐CPS‐L‐MoO2 (EtOH) nanocatalyst was successfully prepared by grafting H2L ligand on modified Fe3O4 nanoparticles followed by reacting with MoO2 (acac)2. The complex and nanocatalyst were characterized by various techniques such as elemental analysis, mass, FT‐IR, UV–Vis, 1H NMR, 13C{1H}‐NMR, TGA, XR… Show more

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Cited by 16 publications
(14 citation statements)
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“…[ 118 ] Moreover, the broad band at around 3392 cm −1 is attributed to asymmetric and symmetric stretching vibrations of –OH band of the surface of the Fe 3 O 4 nanoparticles. [ 119 ] Moreover, The FT‐IR spectra (Figure 1c) of the Fe 3 O 4 @L‐lysine MNPs (c) differed from those of the Fe 3 O 4 NPs and pure L‐lysine amino acid. However, the characteristic bands of L‐lysine were clearly distinguished from those of the Fe 3 O 4 @L‐lysine MNPs.…”
Section: Resultsmentioning
confidence: 99%
“…[ 118 ] Moreover, the broad band at around 3392 cm −1 is attributed to asymmetric and symmetric stretching vibrations of –OH band of the surface of the Fe 3 O 4 nanoparticles. [ 119 ] Moreover, The FT‐IR spectra (Figure 1c) of the Fe 3 O 4 @L‐lysine MNPs (c) differed from those of the Fe 3 O 4 NPs and pure L‐lysine amino acid. However, the characteristic bands of L‐lysine were clearly distinguished from those of the Fe 3 O 4 @L‐lysine MNPs.…”
Section: Resultsmentioning
confidence: 99%
“…[8,29] The absence of the bands due to ν(C=O) and ν(N-H) and appearance of a new band at 1289 cm −1 ((C-O)enolic) in the IR spectrum of Complex 3 suggested the keto-enol tautomerization of the ligands during complexation and ligand coordination to the Cu center in the deprotonated enolic−O. [8,23,30,31] Two strong bands observed at 1618 cm −1 (newly formed (C=N)*) and 1565 cm −1 ((C=N) azomethine ) were assigned to the conjugated -N=C-C=Nfragment. [8,23,32,33] The bands were indicative of M-O, and M-N vibrations at 614-566 cm −1 and 467-458 cm −1 , respectively, and in agreement with those observed in similar complexes.…”
Section: Ir Spectra Of Ligand Ehbbhh 2 and Its Complexesmentioning
confidence: 99%
“…[69] Based on the literature, the oxygen transfer process could be progressed in the presence of a coordinated solvent molecule in the catalyst, [37] in which the oxidant molecule may replace the solvent molecule (water or methanol, ROH) and then bond to the central metal ion (A) in order to generate an active oxo−/peroxomolybdenum complex intermediates, [70] [58] as tBuOO − anion to the Lewis acidic Mo VI ion. [42,71] The bonded tBuOO − to Mo VI ion caused migration of H + of the oxidant to the cis-terminal oxygen of Mo = O species giving peroxointermediate C (in Scheme 3). This was studied previously with new cyclopentadienyl molybdenum imidazo[1,5-a]pyridine-3-ylidene complexes in the olefin epoxidation using tBuOOH.…”
Section: Catalytic (Ep)oxidation Studiesmentioning
confidence: 99%