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

Complexes of the general formula [Ni2L2(l1,1-N3)2(N3)2] have been synthesised in good yields by reacting Ni(NO3)2 Æ 6H2O wit L in the presence of excess of sodium azide in methanol at room temperature. Here L is N,N-bis(2-pyridylmethyl)amine (L) an N-(2-pyridylmethyl)-N 0,N 0-diethylethylenediamine (L). The X-ray structures of both compounds reveal that the N,N,N coordina ing reduced Schiff bases are ligated facially. The Ni–Nazido–Ni angle is 100 and the Ni Ni separation is 3.2 Å. The variab temperature magnetic susceptibility measurements of the two complexes show ferromagnetic behavior.