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Article

Efficient Molybdenum Hydrazonato Epoxidation Catalysts Operating under Green Chemistry Conditions: Water vs. Decane Competition

1
Faculty of Science, Department of Chemistry, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
2
IUT P. Sabatier, Department of Chemistry, University of Toulouse, Av. G. Pompidou, BP20258, CEDEX, 81104 Castres, France
3
CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP44099, CEDEX 4, 31077 Toulouse, France
*
Author to whom correspondence should be addressed.
Academic Editor: Carla D. Nunes
Catalysts 2021, 11(7), 756; https://doi.org/10.3390/catal11070756
Received: 4 June 2021 / Revised: 18 June 2021 / Accepted: 19 June 2021 / Published: 22 June 2021
(This article belongs to the Special Issue Catalysts with Bioinorganic Metal Centres)
Molybdenum compounds containing benzaldehyde-based hydrazones were obtained. The reaction in MeOH resulted with monomeric Mo complexes, [MoO2(L)(MeOH)], while the reaction in dichloromethane (DCM) provided oligomeric complexes, [MoO2(L)]n. The solid-state structures of the obtained compounds were investigated through Infrared Spectroscopy - Attenuated Total Reflection (IR-ATR), Thermogravimetric analysis (TGA), and via X-ray diffraction. The prepared molybdenum species were employed as cyclooctene epoxidation catalysts. TBHP (tert-butylhydroperoxide) in water and TBHP in decane were employed and compared as oxidants, with 0.25 mol% [Mo]. The catalyst activity and selectivity towards epoxide is >90% for all the reactions. The results have been linked to theoretical calculations, showing the importance of the first step, i.e., the transformation of [MoO2(L)(MeOH)] into the pentacoordinate [MoO2(L)]. View Full-Text
Keywords: molybdenum; aroylhydrazone; epoxidation; catalysis; organic solvent-free process; TBHP in decane; TBHP in water; DFT calculations molybdenum; aroylhydrazone; epoxidation; catalysis; organic solvent-free process; TBHP in decane; TBHP in water; DFT calculations
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MDPI and ACS Style

Mrkonja, S.; Topić, E.; Mandarić, M.; Agustin, D.; Pisk, J. Efficient Molybdenum Hydrazonato Epoxidation Catalysts Operating under Green Chemistry Conditions: Water vs. Decane Competition. Catalysts 2021, 11, 756. https://doi.org/10.3390/catal11070756

AMA Style

Mrkonja S, Topić E, Mandarić M, Agustin D, Pisk J. Efficient Molybdenum Hydrazonato Epoxidation Catalysts Operating under Green Chemistry Conditions: Water vs. Decane Competition. Catalysts. 2021; 11(7):756. https://doi.org/10.3390/catal11070756

Chicago/Turabian Style

Mrkonja, Silvija, Edi Topić, Mirna Mandarić, Dominique Agustin, and Jana Pisk. 2021. "Efficient Molybdenum Hydrazonato Epoxidation Catalysts Operating under Green Chemistry Conditions: Water vs. Decane Competition" Catalysts 11, no. 7: 756. https://doi.org/10.3390/catal11070756

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