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Title: Trinuclear Dioxidomolybdenum(VI) Complexes of Tritopic Phloroglucinol-Based Ligands and Their Catalytic Applications for the Selective Epoxidation of Olefins
Authors: Maurya, Mannar Ram
Tomar R.
Rana L.
Avecilla F.
Published in: European Journal of Inorganic Chemistry
Abstract: Four trinuclear dioxidomolybdenum(VI) complexes, [{MoVIO2(H2O)}3ptk(bhz)3] (1), [{MoVIO2(H2O)}3ptk(fah)3] (2), [{MoVIO2(H2O)}3ptk(inh)3] (3), and [{MoVIO2(H2O)}3ptk(nah)3] (4), based on the tritopic central 2,4,6-triacetylphloroglucinol (H3ptk) ligands H6ptk(bhz)3 (I), H6ptk(fah)3 (II), H6ptk(inh)3 (III) and H6ptk(nah)3 (IV) (Hbhz = benzoylhydrazide, Hfah = 2-furanoylhydrazide, Hinh = isonicotinoylhydrazide and Hnah = nicotinoylhydrazide), respectively, are presented. All of the synthesized ligands, as well as their complexes, have been characterized by elemental, thermal, and electrochemical analyses, spectroscopic techniques (FTIR, UV/Vis, 1H and 13C NMR), and single-crystal X-ray studies of [{MoVIO2(H2O)}{MoVIO2(MeOH)}2ptk(bhz)3]·2H2O·1.25MeOH (1a) and [{MoVIO2(EtOH)}3ptk(fah)3]·3EtOH (2a). Each pocket of the ligands coordinates in a dibasic tridentate fashion through two oxygen atoms and one nitrogen atom to each metal center. Due to the presence of tridentate binding pockets in the ligands, each metal center conserves its octahedral structure by coordinating with water molecules in the synthesized complexes or by other solvent(s) in the crystal structures. These complexes were evaluated for the epoxidation of terminal and internal alkenes in the presence of H2O2 using NaHCO3 as a promoter. Under the optimized reaction conditions, all alkenes were converted to the corresponding epoxides selectively in good yield and high turnover number. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Citation: European Journal of Inorganic Chemistry, 2018(25): 2952-2964
Issue Date: 2018
Publisher: Wiley-VCH Verlag
Keywords: Epoxidation
Homogeneous catalysis
N ligands
Structure elucidation
ISSN: 14341948
Author Scopus IDs: 7005255411
Author Affiliations: Maurya, M.R., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Tomar, R., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Rana, L., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Avecilla, F., Departamento de Química Fundamental, Universidade da Coruña, Campus de A Zapateira, A Coruña, 15071, Spain
Funding Details: M. R. M. thanks the Science and Engineering Research Board (SERB), Government of India, New Delhi, for financial support of the work (grant number EMR/2014/000529). R. T. is thankful to the Indian Institute of Technology (IIT) Roorkee, India, for the Institute fellowship. Science and Engineering Research Board, SERB: EMR/2014/000529; Indian Institute of Technology Mandi, IIT
Corresponding Author: Maurya, M.R.; Department of Chemistry, India; email:
Appears in Collections:Journal Publications [CY]

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