期刊
ACTA CHIMICA SLOVENICA
卷 68, 期 2, 页码 441-446出版社
SLOVENSKO KEMIJSKO DRUSTVO
DOI: 10.17344/acsi.2020.6553
关键词
Aroylhydrazone; vanadium complex; catalytic activity; crystal structure
资金
- Fundamental Research Funds in Heilongjiang Provincial Universities [135409307]
Two oxidovanadium(V) complexes derived from aroylhydrazones and ethyl maltolate were synthesized and characterized, exhibiting effective olefin epoxidation catalytic activity. The structures of the complexes were confirmed through various analysis methods.
Two oxidovanadium(V) complexes, [(VOLL)-L-1] (1) and [(VOLL)-L-2] (2) (L = ethyl maltolate), derived from the aroylhydrazones 4-bromo-N'-(2-hydroxy-5-methylbenzylidene)benzohydrazide (H2L1) and N'-(3,5-dibromo-2-hydroxybenzylidene)-4-methoxybenzohydrazide (H2L2), respectively, have been synthesized and characterized by elemental analysis, infrared and electronic spectroscopy. Structures of the complexes were further confirmed by single crystal X-ray determination. The V atoms in the complexes are coordinated by the ONO donor atoms of the aroylhydrazone ligand, ONO donor atoms of the ethyl maltolate ligand, and one oxido O atom, forming octahedral coordination. The complexes function as effective olefin epoxidation catalysts with hydrogen peroxide as terminal oxidant and sodium hydrogen carbonate as a co-catalyst.
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