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Article Dans Une Revue European Journal of Inorganic Chemistry Année : 2006

An original supramolecular helicate from a bipyridine-bipyrazine ligand strand and Ni-II by self-assembly

Résumé

A new discrete supramolecular pseudo-helicate has been obtained from a saturated heterotopic methylbipyrazyl-methylbipyridyl ligand strand and NiCl2. The X-ray structure of the dinuclear complex shows the 2-oxapropylene bridge oxygen atoms are engaged in coordination to the octahedral metal centre and a selective ligand inter-strand orientation is promoted in the complex. The crystal packing shows a perfect regular linear arrangement of the asymmetric units giving a packing of interacting molecules having well-defined rectangular and polygonal open channels. Although a paramagnetic behaviour is observed above 10 K, below this temperature a significant deviation of this behaviour suggests the presence of an Ni-II-Ni-II magnetic coupling.

Dates et versions

hal-00133316 , version 1 (25-02-2007)

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Citer

Bernard Fraisse, Noureddine Ghermani, J. Mathieu, D. Lacour, F. Montaigne, et al.. An original supramolecular helicate from a bipyridine-bipyrazine ligand strand and Ni-II by self-assembly. European Journal of Inorganic Chemistry, 2006, pp.133-136. ⟨10.1002/ejic.200500660⟩. ⟨hal-00133316⟩
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