Abstract
A new end-on bis(μ-azido) nickel(II) complex of the formula [Ni 2(L 1)(N 3) 4] ( 1) (L 1=hexadentate Schiff base ligand made from the reaction of 2 moles of 2-benzoyl pyridine and 1 mole of triethylenetetramine) has been prepared and characterized by single crystal X-ray diffraction studies. Each nickel center is coordinated in a distorted octahedral (NiN 6) fashion consisting of three nitrogen atoms from the hexadentate ligand moiety, two nitrogen atoms from two end-on azido ligands and the last one from another terminal azido ion. The variable temperature magnetic susceptibility of compound 1 shows that the nickel centers are ferromagnetically coupled. The NiNNi bridge angles are very similar [98.36(8)° and 97.66(9)°] and the Ni⋯Ni separation is 3.155(1) Å. The magnetic exchange coupling constant J=21.8 cm −1 is consistent with the structure and the value has been compared with some similar reported compounds.
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