Low-temperature magnetization and spectral studies of cobalt complexes of alpha-furilglyoxime

M. Sakhawat Hussain; Gul Dad Khattak

doi:10.1016/0304-8853(94)90085-X

Low-temperature magnetization and spectral studies of cobalt complexes of alpha-furilglyoxime

M. Sakhawat Hussain^*
, Gul Dad Khattak

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Magnetization and spectroscopic studies were carried out on [Co(Hafdo)₂X₂] complexes X being the monodentate O, S, P, As and Se donor ligands attached to the axial positions. Cobalt(II) undergoes air oxidation to cobalt(III), when a strong-field ligand is attached to the axial positions but when water is the axial ligand, the oxidation of cobalt(II) was not observed. The [Co(Hafdo)₂X₂] moiety exhibits intramolecular short hydrogen bond with the glyoximes occupying the equatorial plane and the monodentate ligands attached to the axial positions. The mole fraction of cobalt(II) in the paramagnetic [Co(Hafdo)₂(H₂O)₂] complex, calculated from the magnetization data, is from 0.14-0.18 for the temperature range of 4.2 to 30 K.

Original language	English
Pages (from-to)	137-142
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	134
Issue number	1
DOIs	https://doi.org/10.1016/0304-8853(94)90085-X
State	Published - 2 May 1994

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Low-temperature magnetization and spectral studies of cobalt complexes of alpha-furilglyoxime",

abstract = "Magnetization and spectroscopic studies were carried out on [Co(Hafdo)2X2] complexes X being the monodentate O, S, P, As and Se donor ligands attached to the axial positions. Cobalt(II) undergoes air oxidation to cobalt(III), when a strong-field ligand is attached to the axial positions but when water is the axial ligand, the oxidation of cobalt(II) was not observed. The [Co(Hafdo)2X2] moiety exhibits intramolecular short hydrogen bond with the glyoximes occupying the equatorial plane and the monodentate ligands attached to the axial positions. The mole fraction of cobalt(II) in the paramagnetic [Co(Hafdo)2(H2O)2] complex, calculated from the magnetization data, is from 0.14-0.18 for the temperature range of 4.2 to 30 K.",

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doi = "10.1016/0304-8853(94)90085-X",

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T1 - Low-temperature magnetization and spectral studies of cobalt complexes of alpha-furilglyoxime

AU - Hussain, M. Sakhawat

AU - Khattak, Gul Dad

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N2 - Magnetization and spectroscopic studies were carried out on [Co(Hafdo)2X2] complexes X being the monodentate O, S, P, As and Se donor ligands attached to the axial positions. Cobalt(II) undergoes air oxidation to cobalt(III), when a strong-field ligand is attached to the axial positions but when water is the axial ligand, the oxidation of cobalt(II) was not observed. The [Co(Hafdo)2X2] moiety exhibits intramolecular short hydrogen bond with the glyoximes occupying the equatorial plane and the monodentate ligands attached to the axial positions. The mole fraction of cobalt(II) in the paramagnetic [Co(Hafdo)2(H2O)2] complex, calculated from the magnetization data, is from 0.14-0.18 for the temperature range of 4.2 to 30 K.

AB - Magnetization and spectroscopic studies were carried out on [Co(Hafdo)2X2] complexes X being the monodentate O, S, P, As and Se donor ligands attached to the axial positions. Cobalt(II) undergoes air oxidation to cobalt(III), when a strong-field ligand is attached to the axial positions but when water is the axial ligand, the oxidation of cobalt(II) was not observed. The [Co(Hafdo)2X2] moiety exhibits intramolecular short hydrogen bond with the glyoximes occupying the equatorial plane and the monodentate ligands attached to the axial positions. The mole fraction of cobalt(II) in the paramagnetic [Co(Hafdo)2(H2O)2] complex, calculated from the magnetization data, is from 0.14-0.18 for the temperature range of 4.2 to 30 K.

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DO - 10.1016/0304-8853(94)90085-X

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1

ER -

Low-temperature magnetization and spectral studies of cobalt complexes of alpha-furilglyoxime

Abstract

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