Synthesis and crystal structures of Schiff base oxovanadium(V) complexes [VO(Bhm)(OCH3)(CH3OH)] and [VO2(Bpp)

Abstract

Compound [VO(acac)2] reacts with the Schiff bases N′-(5-bromo-2-hydroxybenzylidene)-2-hydroxy-3-methylbenzohydrazide (H2Bhm) and 4-bromo-2-[(2-piperidin-1-ylethylimino)methyl]phenol (HBpp) in absolute methanol to give the oxovanadium(V) complexes [VO(Bhm)(OCH3)(CH3OH)] (I) and [VO2(Bpp)] (II), respectively. Both complexes were characterized by elemental analysis, IR spectra, and single-crystal X-ray determination. The crystal of I crystallizes in the triclinic space group \(P\bar 1\) with a = 7.625(2), b = 11.240(3), c = 12.156(4) A, α = 77.404(5)°, β = 75.770(4)°, γ = 79.922(5)°, V = 977.4(5) A3, Z = 2. The crystal of II crystallizes in the monoclinic space group P2/c with a = 26.760(3), b = 6.655(1), c = 17.570(2) A, β = 100.335(2)°, V = 3078.2(7) A3, Z = 8. The V atom in I is in an octahedral coordination, and those in II are intervenient between square pyramidal and trigonal bipyramidal coordination.