Issue 5, 2016

Six- and seven-coordinate Fe(ii) and Zn(ii) compounds ligated by unsymmetric xanthene-based ligands: characterization and magnetic properties

Abstract

The synthesis of a set of novel unsymmetric ligands, iXa and iXa-2, and of their corresponding FeII and ZnII complexes are described. The ligands incorporate a redox-active α-diimine moiety alongside (2-pyridylmethyl)amino groups. Electrochemical data highlight ligand-centered reduction processes available in these systems. The molecular structures of the series of six- and seven-coordinate metal complexes reveal a pentagonal bipyramidal geometry for all compounds. The ligands and complexes were further characterized in the solution state by NMR spectroscopy, with assignments supported by DFT calculations. The ferrous-iXa and -iXa-2 complexes have a high spin, S = 2 configuration. Magnetic susceptibility studies reveal the unusual low-temperature ferromagnetism of these complexes. Intermolecular interactions between the iron centers are mediated by the PF6 counterions, as evidenced by 31P-NMR studies.

Graphical abstract: Six- and seven-coordinate Fe(ii) and Zn(ii) compounds ligated by unsymmetric xanthene-based ligands: characterization and magnetic properties

Supplementary files

Article information

Article type
Research Article
Submitted
21 dek 2015
Accepted
29 yan 2016
First published
04 fev 2016

Inorg. Chem. Front., 2016,3, 616-629

Six- and seven-coordinate Fe(II) and Zn(II) compounds ligated by unsymmetric xanthene-based ligands: characterization and magnetic properties

R. M. Haas, M. Arshad, J. Anthony, P. J. Altmann, A. Pöthig, F. H. Köhler and C. R. Hess, Inorg. Chem. Front., 2016, 3, 616 DOI: 10.1039/C5QI00298B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements