Synthesis, spectroscopic properties, and magnetic properties of complexes of VO(II) with salicylaldimines containing sterically hindered phenols
Complexes of VO(II) with salicylaldimines obtained from derivatives of salicylaldehyde and 2,6-di-tert-butyl-4 aminophenol have been synthesized. The spectroscopic (IR, ESR, and optical) and magnetic properties have been studied. The IR spectra of the complexes display stretching vibrations of OH, C=N, and V=O groups at 3625-3640, 1608-1615, and 985-990 cm/sup -1/, respectively. The electronic spectra in THF, in contrast to the case of CHCl/sub 3/, do not show a band with a frequency corresponding to 590 nm, and they show a shift to longer wavelengths at 930 nm, apparently due to the interaction of the complexes with THF molecules. The parameters of the spin Hamiltonian have been determined from the ESR spectra. The values found for the magnetic moments (1.66-1.83 Bohr magnetons) indicate that weak ferromagnetism is observed in the polycrystalline stage in cases of disubstituted compounds. When the complexes are oxidized with PbO/sub 2/ in solutions in toluene and CHCl/sub 3/, a decrease in the intensity of the ESR signal of the vanadyl ions and the formation of free phenoxyl radicals are observed.
- OSTI ID:
- 5325112
- Journal Information:
- Sov. J. Coordinat. Chem.; (United States), Vol. 13:1; Other Information: Translated from Koord. Khim.; 13: No. 1, 74-79(Jan 1987)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
74 ATOMIC AND MOLECULAR PHYSICS
VANADIUM COMPLEXES
ELECTRON SPIN RESONANCE
HYPERFINE STRUCTURE
INFRARED SPECTRA
MAGNETIC PROPERTIES
SYNTHESIS
BOHR THEORY
FERROMAGNETISM
IMINES
LEAD OXIDES
LINE BROADENING
LINE WIDTHS
MAGNETIC DIPOLE MOMENTS
OXIDATION
PHENOLS
PHENOXY RADICALS
SALICYLIC ACID
SCHIFF BASES
VANADATES
VANADIUM 51
AROMATICS
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
DIPOLE MOMENTS
HYDROXY ACIDS
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEAD COMPOUNDS
MAGNETIC MOMENTS
MAGNETIC RESONANCE
MAGNETISM
NUCLEI
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADICALS
RESONANCE
SPECTRA
STABLE ISOTOPES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM ISOTOPES
400201* - Chemical & Physicochemical Properties
360603 - Materials- Properties
640302 - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory