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Title: Oxidation of secondary alcohols by conventional and microwave-assisted methods using molybdenum complexes of ONO donor ligands
Authors: Maurya, Mannar Ram
Dhaka S.
Avecilla F.
Published in: New Journal of Chemistry
Abstract: New dioxidomolybdenum(vi) complexes, [MoVIO2{Hdfmp(bhz)2}(MeOH)] 1, [MoVIO2{Hdfmp(inh)2}(MeOH)] 2 and [MoVIO2{Hdfmp(nah)2}(MeOH)] 3 of ligand H3dfmp(L)2I, are obtained by the condensation of 2,6-diformyl-4-methylphenol (dfmp) and hydrazides (L) [L = benzoylhydrazide (bhz), isonicotinoylhydrazide (inh), and nicotinoylhydrazide (nah)], respectively. All these complexes are characterized in the solid state and in solution namely by elemental analyses, spectroscopic techniques (IR, electronic, 1H and 13C NMR) and thermogravimetric analyses. Single crystal X-ray analysis of complexes 1 and 3 confirms the coordination of the ligand in the dianionic (ONO2-) enolate-tautomeric form and one of the hydrazido moieties remains non-coordinated. Oxidation of secondary alcohols: 1-phenyl ethanol, 2-propanol and 2-butanol, catalyzed by these molybdenum complexes, using conventional liquid phase and microwave-assisted methods in the presence of 30% H2O2 as an oxidant has been tested. The effects of various factors, such as temperature and amounts of catalyst, H2O2 and solvent have been investigated. These alcohols under the optimized reaction conditions gave high yields of the respective ketone. Addition of an N-based additive reduces the reaction time considerably. Amongst the two methods studied, the microwave technique proves to be a time efficient system. This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Citation: New Journal of Chemistry, 39(3): 2130-2139
Issue Date: 2015
Publisher: Royal Society of Chemistry
Keywords: alcohol derivative
molybdenum complex
carbon nuclear magnetic resonance
chemical analysis
crystal structure
microwave radiation
priority journal
proton nuclear magnetic resonance
reaction time
solid state
X ray analysis
X ray diffraction
ISSN: 11440546
Author Scopus IDs: 7005255411
Author Affiliations: Maurya, M.R., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Dhaka, S., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Avecilla, F., Departamento de Química Fundamental, Universidade da Coruña Campus de A Zapateira, Coruña, 15071 A, Spain
Funding Details: 
Corresponding Author: Maurya, M.R.; Department of Chemistry, India; email:
Appears in Collections:Journal Publications [CY]

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