Issue 17, 2004
From the journal:

Dalton Transactions

Nickel pivalate complexes: structural variations and magnetic susceptibility and inelastic neutron scattering studies

Grégory Chaboussant,†*a   Reto Basler,a   Hans-Ulrich Güdel,*a   Stefan Ochsenbein,a   Andrew Parkin,c   Simon Parsons,c   Gopalan Rajaraman,b   Andreas Sieber,a   Andrew A. Smith,b   Grigore A. Timcod  and  Richard E. P. Winpenny*b  

* Corresponding authors

a Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland

b Department of Chemistry, The University of Manchester, Oxford Road, Manchester, UK

c Department of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh, UK

d Institute of Chemistry, Moldova Academy of Sciences, Academei Str. 3, Kishinev, Moldova MD-2028

Abstract

The synthesis and structural characterisation of three small nickel(II) cages are reported, all stabilised by pivalate ligands. The magnetic properties of the cages have been studied by a combination of susceptibility measurements and inelastic neutron scattering. For a dinuclear cage, [Ni2(μ-OH2)(O2CCMe3)4(HO2CCMe3)4] 1 the ground state is S = 2, with a ferromagnetic exchange interaction between the Ni(II) centres of J = 0.32 meV and DS=2 = −0.09 meV in the ground state. For a tetranuclear heterocubane cage, [Ni4(μ3-OMe)4(O2CCMe3)4(MeOH)4] 2, two ferromagnetic exchange interactions are found and an S = 4 ground state observed. While the zero-field splitting of this state cannot be determined unambigiously the most likely value is DS=4 = −0.035 meV. For a tetranuclear nickel butterfly, [Ni4(μ3-OH)2(O2CCMe3)6(EtOH)6] 3, three exchange interactions are required, two anti-ferromagnetic and one weakly ferromagnetic; the resulting ground state is S = 0. The data enable us to estimate the zero-field splitting of single Ni(II) ions involved in the cage as Di = +1.0 meV. Both 1 and 2 are therefore expected to be new single molecule magnets.

Graphical abstract: Nickel pivalate complexes: structural variations and magnetic susceptibility and inelastic neutron scattering studies

About
Cited by
Related
Download options Please wait...

Article information

DOI
https://doi.org/10.1039/B406112H
Article type
Paper
Submitted
23 Apr 2004
Accepted
08 Jul 2004
First published
28 Jul 2004

Dalton Trans., 2004, 2758-2766

Permissions

Request permissions

Nickel pivalate complexes: structural variations and magnetic susceptibility and inelastic neutron scattering studies

G. Chaboussant, R. Basler, H. Güdel, S. Ochsenbein, A. Parkin, S. Parsons, G. Rajaraman, A. Sieber, A. A. Smith, G. A. Timco and R. E. P. Winpenny, Dalton Trans., 2004, 2758 DOI: 10.1039/B406112H

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