Faculté des sciences

Synthesis, structure and magnetic properties of two end-on double azido bridged nickel(II) dinuclear entities incorporating N,N,N-coordinating tridentate reduced Schiff base ligands

Sarkar, Sumana ; Mondal, Amrita ; El Fallah, Mohamed Salah ; Ribas, Joan ; Chopra, Deepak ; Stoeckli-Evans, Helen ; Krishna Rajak, Kajal

In: Polyhedron, 2006, vol. 25, no. 1, p. 25-30

Complexes of the general formula [Ni2L2 (μ1,1-N3)2(N3)2] have been synthesised in good yields by reacting Ni(NO3)2 • 6H2O with L in the presence of excess of sodium azide in methanol at room temperature. Here L is N,N-bis(2-pyridylmethyl)amine (L1) and... Plus

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    Summary
    Complexes of the general formula [Ni2L21,1-N3)2(N3)2] have been synthesised in good yields by reacting Ni(NO3)2 • 6H2O with L in the presence of excess of sodium azide in methanol at room temperature. Here L is N,N-bis(2-pyridylmethyl)amine (L1) and N-(2-pyridylmethyl)-N′,N′-diethylethylenediamine (L2). The X-ray structures of both compounds reveal that the N,N,N coordinating reduced Schiff bases are ligated facially. The Ni–Nazido–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.