Synthesis and Crystal Structures of Oxidovanadium(V) Complexes Derived from Hydrazones with the Catalytic Property

Resumo

Two new structurally similar oxidovanadium(V) complexes [VOL¹L] (1) and [VOL²L] (2) (L = acetohydroxamate) derived from N′-(5-bromo-2-hydroxybenzylidene)-2-methylbenzohydrazide (H₂L¹) and N′-(2-hydroxy-4-methoxybenzylidene)-3-methylbenzohydrazide (H₂L²) hydrazones are prepared and characterized by elemental analyses, FT-IR, ¹H NMR, and single crystal X-ray diffraction (CIF files CCDC Nos. 1859442 (1) and 1859446 (2)). The V atoms in the complexes are in the octahedral coordination, with hydrazones behaving as binegative donors and acetohydroxamate acting as a mononegative ligand. The complexes function as effective olefin epoxidation catalysts.