Jump to main content
Jump to site search

Issue 5, 2015
Previous Article Next Article

The structure, magnetism and EPR spectra of a (μ-thiophenolato)(μ-pyrazolato-N,N′) double bridged dicopper(II) complex

Author affiliations

Abstract

A new binuclear copper(II) complex, namely [Cu2L(pz)(DMSO)], where L = 2,6-bis[(2-phenoxy)iminomethyl]-4-methylthiophenolate(3-) and pz = pyrazolate ligand, has been synthesized by a one-pot synthesis involving copper(II) acetate monohydrate, the S-protected ligand precursor 2-(N,N-dimethylthiocarbamato)-5-methylisophthalaldehyde di-2′-hydroxy anil, (I), and pyrazole, in which a metal-promoted S-deprotection reaction occurs during the formation of the complex. This was characterized by routine physicochemical studies, single crystal X-ray diffraction and electron paramagnetic resonance (EPR) techniques. The structure analysis reveals that there are copper centres in two different environments, a slightly distorted square planar and a distorted square-pyramidal, arranged in binuclear units. The EPR study of these binuclear units performed at 9.4 GHz in the temperature range between 4 and 293 K shows an antiferromagnetic interaction between CuII ions, and allows evaluating g factors gx = 2.068(1), gy = 2.091(1) and gz = 2.165(1), with <g> = 2.108(1), an exchange coupling parameter J0 = −26(1) cm−1 (defined as Image ID:c4dt03322a-t1.gif), and a zero field splitting of the ground triplet state described by D = 86(2) × 10−4 cm−1 and E = −48(3) × 10−4 cm−1. These results are discussed and compared with the existing literature.

Graphical abstract: The structure, magnetism and EPR spectra of a (μ-thiophenolato)(μ-pyrazolato-N,N′) double bridged dicopper(ii) complex

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Oct 2014, accepted on 06 Dec 2014 and first published on 11 Dec 2014


Article type: Paper
DOI: 10.1039/C4DT03322A
Author version
available:
Download author version (PDF)
Citation: Dalton Trans., 2015,44, 2431-2438
  •   Request permissions

    The structure, magnetism and EPR spectra of a (μ-thiophenolato)(μ-pyrazolato-N,N′) double bridged dicopper(II) complex

    N. Khadir, D. M. Boghaei, A. Assoud, O. R. Nascimento, A. Nicotina, L. Ghivelder and R. Calvo, Dalton Trans., 2015, 44, 2431
    DOI: 10.1039/C4DT03322A

Search articles by author

Spotlight

Advertisements