Oximato-bridged copper(II) compounds: syntheses, molecular structures, magnetic, thermal and spectroscopic properties

  • Jnan P. Naskar (Contributor)
  • Chiranjan Biswas (Contributor)
  • Nirmalya Bandyopadhyay (Contributor)
  • James Walsh (EPSRC National UK EPR Facility) (Contributor)
  • Floriana Tuna (Contributor)
  • Miaoli Zhu (Contributor)
  • Liping Lu (Contributor)

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    Description

    <p>Reaction of the Schiff base, 1-(4-methylimidazol-5-yl) phenylhydrazonopropane-2-one oxime (LH), with copper(II) perchlorate hexahydrate and copper(II) nitrate trihydrate in a 1 : 1 M proportion in methanol affords [Cu<sub>2</sub>L<sub>2</sub>(H<sub>2</sub>O)(ClO<sub>4</sub>)](ClO<sub>4</sub>) (<b>1</b>) and [Cu<sub>2</sub>L<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>](NO<sub>3</sub>)<sub>2</sub>] (<b>2</b>) in moderate yields. Both <b>1</b> and <b>2</b> have been characterized by elemental analysis, ESI-MS, FT-IR, UV–vis absorption spectroscopy, EPR, electric conductivity, and magnetic susceptibility measurements. The X-ray crystal structures of <b>1·CH</b><sub><b>3</b></sub><b>COCH</b><sub><b>3</b></sub> and <b>2</b> have been determined. Both compounds are dinuclear copper(II) complexes, with each copper <i>μ</i><sub>2</sub>-bridged by two oxime ligands in a <i>μ</i><sub>2</sub>-<i>η</i><sup>1</sup>,<i>η</i><sup>2</sup> fashion. Variable temperature magnetic studies on <b>1</b> and <b>2</b> show that both compounds are dominated by an antiferromagnetic coupling through the oxime bridges.</p>
    Date made available16 Jul 2016
    Publisherfigshare

    Research Beacons, Institutes and Platforms

    • Photon Science Institute

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