Issue 6, 2004
From the journal:

New Journal of Chemistry

Three new dinuclear copper(ii) complexes with [Cu(μ1,3-N3)2Cu]2+ and [Cu(μ1,1-N3)2Cu]2+ asymmetrical cores: syntheses, structures and magnetic behaviour

Albert Escuer,a   Mercè Font-Bardía,b   Salah S. Massoud,c   Franz A. Mautner,d   Evaristo Peñalba,a   Xavier Solansb  and  Ramon Vicente*a  

* Corresponding authors

a Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, Barcelona, Spain
E-mail: ramon.vicente@qi.ub.es
Fax: +34 934907725

b Departament de Cristal.lografia, Mineralogia i Dipòsits Minerals, Universitat de Barcelona, Martí i Franquès s/n, Barcelona, Spain

c Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA, USA

d Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, Graz, Austria

Abstract

Three new dinuclear copper(II) complexes, derived from end-to-end and end-on azido bridging ligands and triamine derivatives, have been synthesized and their crystal structures have been determined by X-ray diffraction methods. These are the dinuclear end-to-end compounds, [Cu2(μ1,3-N3)2(Et3dien)2](ClO4)2 (1) and [Cu2(μ1,3-N3)2(Medpt)2](ClO4)2 (2), and the dinuclear end-on compound [Cu2(μ1,1-N3)2(Medien)2](ClO4)2 (3) (Et3dien is triethyldiethylenetriamine, Medpt is methyldipropylenetriamine and Medien is methyldiethylenetriamine). The [Cu(μ-N3)2Cu]2+ cores are asymmetrical in all 3 compounds. Variable temperature magnetic susceptibility data were collected and fitted to the appropriate equation derived from the Hamiltonian H = −JS1S2. 1 shows unusual ferromagnetic interactions with J = 9 cm−1 through the end-to-end azido bridges while 2 shows an antiferromagnetic interaction through the end-to-end azido bridges with the highest reported absolute magnitude of J = −105 cm−1. The magnetic data of 1 and 2 have been correlated with the Addison parameter, τ, and mainly with the Cu–N3–Cu torsion angle, Δ. 3 shows an unusual antiferromagnetic interaction with J = −16.8 cm−1 through the end-on azido bridges.

Graphical abstract: Three new dinuclear copper(ii) complexes with [Cu(μ1,3-N3)2Cu]2+ and [Cu(μ1,1-N3)2Cu]2+ asymmetrical cores: syntheses, structures and magnetic behaviour

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/B314526C
Article type
Paper
Submitted
11 Nov 2003
Accepted
21 Jan 2004
First published
06 May 2004

New J. Chem., 2004,28, 681-686

Permissions

Request permissions

Three new dinuclear copper(II) complexes with [Cu(μ1,3-N3)2Cu]2+ and [Cu(μ1,1-N3)2Cu]2+ asymmetrical cores: syntheses, structures and magnetic behaviour

A. Escuer, M. Font-Bardía, S. S. Massoud, F. A. Mautner, E. Peñalba, X. Solans and R. Vicente, New J. Chem., 2004, 28, 681 DOI: 10.1039/B314526C

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