Jump to main content
Jump to site search

Issue 35, 2014
Previous Article Next Article

Influence of the coligand in the magnetic properties of a series of copper(II)–phenylmalonate complexes

Author affiliations

Abstract

This work presents a series of layered systems based on phenylmalonate-containing copper(II) complexes and different coligands. Eight compounds [Cu(L)(Phmal)]n where L = pyrimidine (pym, 1) pyrazine (pyz, 2), 3-cyanopyridine (3-CNpy, 3), 4-cyanopyridine (4-CNpy, 4), 3-fluoropyridine (3-Fpy, 5), 3-chloropyridine (3-Clpy, 6), 3-bromopyridine (3-Brpy, 7) and 3-iodopyridine (3-Ipy, 8), have been synthesized and magneto-structurally characterized. The coligands selected not only modify the coordination environment of the metal ion, blocking or extending the polymerization, but also interact with the phenyl ring of the phenylmalonate ligand and dramatically affect the crystal packing through weak interactions. The crystallographic analysis reveals that compounds 1–8 present a corrugated square grid of carboxylate bridged copper(II) atoms where the pyridine ligands are alternatively located above and below each layer and, at the same time, inversely to the position of the phenyl group of the Phmal ligand. It is important to note that the pym and pyz ligands in 1 and 2 do not act as bridges between two copper atoms, whereas weak interactions between the cyano groups are also present in the structures of the complexes 3 and 4. The increase of the Van der Waals radius of the halogen along the series 5–8 accounts for the increase of the interlayer separation. Variable-temperature magnetic susceptibility measurements show the occurrence of different magnetic behaviours. Weak interactions are expected for the antisyn carboxylate bridge in the out-of-plane configuration, that can be either ferro- or antiferromagnetic. Therefore, in this manuscript we shed light on the influence of the magneto-structural relationship in these square grid layered Cu(II) complexes.

Graphical abstract: Influence of the coligand in the magnetic properties of a series of copper(ii)–phenylmalonate complexes

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Apr 2014, accepted on 29 May 2014 and first published on 29 May 2014


Article type: Paper
DOI: 10.1039/C4CE00834K
Author version available: Download Author version (PDF)
Citation: CrystEngComm, 2014,16, 8106-8118
  •   Request permissions

    Influence of the coligand in the magnetic properties of a series of copper(II)–phenylmalonate complexes

    J. Pasán, J. Sanchiz, Ó. Fabelo, L. Cañadillas-Delgado, M. Déniz, P. Díaz-Gallifa, C. Martínez-Benito, F. Lloret, M. Julve and C. Ruiz-Pérez, CrystEngComm, 2014, 16, 8106
    DOI: 10.1039/C4CE00834K

Search articles by author

Spotlight

Advertisements