Issue 17, 2004

Synthesis and magnetism of oxygen-bridged tetranuclear defect dicubane Co(ii) and Ni(ii) clusters

Abstract

Reaction of aqueous/ethanolic solutions of CoCl2·6H2O and nitrilotripropionic acid (H3ntp = N(CH2CH2COOH)3) in the presence of potassium hydroxide affords the hydroxy-bridged tetranuclear cluster [Co43-OH)2(H2O)6(ntp)2]·2H2O (1). The Ni(II) analogue [Ni43-OH)2(H2O)6(ntp)2]·2H2O (2) can also be isolated using aqueous solutions and Ni(SO4)·7H2O as metal salt. With small changes in reaction conditions the methoxy-bridged analogue, [Ni43-OMe)2(H2O)6(ntp)2] (3), can also be isolated. In these tetramers the M(II) ions are oxygen-bridged and exhibit a defect dicubane-like core with two missing vertices. The magnetic properties have been studied for all three clusters and reveal competing antiferromagnetic and ferromagnetic interactions between the four Co(II) ions in 1 and ferromagnetic coupling between the four Ni(II) ions in 2 and 3. In all three compounds the individual clusters order antiferromagnetically at Néel temperatures below 1 K.

Graphical abstract: Synthesis and magnetism of oxygen-bridged tetranuclear defect dicubane Co(ii) and Ni(ii) clusters

Article information

Article type
Paper
Submitted
20 Apr 2004
Accepted
14 Jul 2004
First published
09 Aug 2004

Dalton Trans., 2004, 2670-2676

Synthesis and magnetism of oxygen-bridged tetranuclear defect dicubane Co(II) and Ni(II) clusters

P. King, R. Clérac, W. Wernsdorfer, C. E. Anson and A. K. Powell, Dalton Trans., 2004, 2670 DOI: 10.1039/B405881J

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