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Synthesis, structure and magnetic properties of two end-on double azido bridged nickel(II) dinuclear entities incorporating <i>N,N,N</i>-coordinating tridentate reduced Schiff base ligands
Auteur(s)
Sarkar, Sumana
Mondal, Amrita
El Fallah, Mohamed Salah
Ribas, Joan
Chopra, Deepak
Krishna Rajak, Kajal
Date de parution
2006
In
Polyhedron, Elsevier, 2006/25/1/25-30
Résumé
Complexes of the general formula [Ni<sub>2</sub>L<sub>2</sub> (μ<sub>1,1</sub>-N<sub>3</sub>)<sub>2</sub>(N<sub>3</sub>)<sub>2</sub>] have been synthesised in good yields by reacting Ni(NO<sub>3</sub>)<sub>2</sub> • 6H<sub>2</sub>O with L in the presence of excess of sodium azide in methanol at room temperature. Here L is N,N-bis(2-pyridylmethyl)amine (L<sub>1</sub>) and N-(2-pyridylmethyl)-<i>N′</i>,<i>N′</i>-diethylethylenediamine (L<sub>2</sub>). The X-ray structures of both compounds reveal that the <i>N,N,N</i> coordinating reduced Schiff bases are ligated facially. The Ni–N<sub>azido</sub>–Ni angle is 100° and the NiNi separation is 3.2 Å. The variable temperature magnetic susceptibility measurements of the two complexes show ferromagnetic behavior.
Identifiants
Type de publication
journal article
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