Startseite Synthesis, crystal structures, spectral, electrochemical and magnetic properties of di-µ-phenoxido-bridged dinuclear copper(II) complexes with N-salicylidene-2-hydroxybenzylamine derivatives: axial coordination effect of dimethyl sulphoxide molecule
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Synthesis, crystal structures, spectral, electrochemical and magnetic properties of di-µ-phenoxido-bridged dinuclear copper(II) complexes with N-salicylidene-2-hydroxybenzylamine derivatives: axial coordination effect of dimethyl sulphoxide molecule

  • Yoshihisa Kakuta EMAIL logo , Naoyuki Masuda , Michihiro Kurushima , Takashi Hashimoto , Daisuke Yoshioka , Hiroshi Sakiyama , Yuya Hiraoka , Makoto Handa und Masahiro Mikuriya
Veröffentlicht/Copyright: 12. März 2014
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Chemical Papers
Aus der Zeitschrift Chemical Papers Band 68 Heft 7

Abstract

The template reaction of salicylaldehyde and its substituted derivatives and 2-hydroxy-5-bromobenzylamine or 2-hydroxy-5-chlorobenzylamine with copper(II) acetate in dimethyl sulphoxide (dmso) afforded eight dinuclear Cu(II) complexes, [Cu2(L)2(dmso)2] (H2 L = N-salicylidene-2-hydroxy-5-bromobenzylamine, N-salicylidene-2-hydroxy-5-chlorobenzylamine and their 5-bromo, 5-nitro and 5-methyl-substituted salicylidene derivatives). These Cu(II) complexes were characterised by IR and UV-VIS-NIR spectroscopy, electric conductivity, cyclic voltammetry, and temperature dependence of magnetic susceptibilities (4.5–300 K). In the THF solution, the complexes are nonelectrolytes and exhibit a characteristic CT band due to phenoxido-bridging at 360–384 nm. In the cyclic voltammograms, an irreversible reduction process was observed at −1.18–1.54 V vs Fc/Fc+. Single-crystal X-ray crystallography revealed that two Cu(II) ions were bridged by the two phenoxido-oxygen atoms of the two Schiff-base ligands with axial coordination of dmso molecules forming a square pyramid with a Cu-Cu distance of 3.0628(8)–3.0931(6) °A. In accordance with the crystal structures, the magnetic interaction between the two Cu(II) ions is relatively anti-ferromagnetic with −2J value of 386–575 cm−1. The axial coordination effect of the dmso molecule was discussed in relation to the correlation between the Cu-O-Cu angle and the −2J value.

Keywords: dinuclear copper(II) complex; phenoxido-bridged complex; magnetic properties; crystal structure; dimethyl sulphoxide

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Published Online: 2014-3-12
Published in Print: 2014-7-1

© 2013 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.2478/s11696-013-0528-0
Schlagwörter für diesen Artikel
dinuclear copper(II) complex; phenoxido-bridged complex; magnetic properties; crystal structure; dimethyl sulphoxide

Artikel in diesem Heft

  1. Kinetic analysis of cellulose pyrolysis: a short review
  2. Simultaneous determination of ciprofloxacin hydrochloride and hydrocortisone in ear drops by high performance liquid chromatography
  3. Inhibition effect of free ammonia and free nitrous acid on nitrite-oxidising bacteria during sludge liquor treatment: influence of feeding strategy
  4. Thermo-chemical properties of biomass from Posidonia oceanica
  5. Al(III) and Cu(II) simultaneous foam separation: Physicochemical problems
  6. Scale-adaptive simulation of liquid mixing in an agitated vessel equipped with eccentric HE 3 impeller
  7. Alkaline hydrogen peroxide pretreatment of energy crops for biogas production
  8. Synthesis, crystal structures, spectral, electrochemical and magnetic properties of di-µ-phenoxido-bridged dinuclear copper(II) complexes with N-salicylidene-2-hydroxybenzylamine derivatives: axial coordination effect of dimethyl sulphoxide molecule
  9. Hemilabile imino-phosphine palladium(II) complexes: synthesis, molecular structure, and evaluation in Heck reactions
  10. Structure and vibrational spectra of copper(II) 2-pyridylmethanolate tetrahydrate
  11. Synthesis and characterization of a silylated Brazilian clay mineral surface
  12. Nano-titanium oxide doped with gold, silver, and palladium — synthesis and structural characterization
  13. Synthesis and insecticidal activity of 6,8-dichloro-quinazoline derivatives containing a sulfide substructure
  14. Effect of extraction method on phenolic content and antioxidant activity of mistletoe extracts from Viscum album subsp. abietis
  15. Synthesis of melamine-formaldehyde resin functionalised with sulphonic groups and its catalytic activities
  16. Synthesis, characterization, and application of a new tripodal ligand for the preparation of LSCF(6482) perovskite
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