A binuclear nickel(Ⅱ) complex of [Ni2(bispicen)2(μ-N3)2] (ClO4)2 [bispicen=N,N'-bis (2-pyridylmethyl)ethylenediamine] has been synthesized and characterized by means of elemental analysis, IR and electronic spectra. The crystal structure was determined by single- crystal X-ray diffraction technology. The complex crystallizes in orthorhombic space group P212121.The nickel(Ⅱ) ion resides in a pseudo- octahedral environment with a cis-α configuration. The azidoligand bridges two Ni(Ⅱ) ions in the μ-1,3(end-to-end) mode, and unlike most polynuclear complexes with double μ-1,3-N3 bridges, where the (N3)2 bridging moiety forms a plane, the two azido bridges in the present complex are non-coplanar and crossed at an angle of 49. 7°. The temperature dependence of the manetic susceptibility of the complex has been investigated and revealed an antiferromagnetic interaction between the two Ni(Ⅱ) ions with the exchange integral J=- 28.1 cm^-1(based on H^=-2JS1^S2^).

Key words: AZIDO COMPLEX, ANTIFERROMAGNETISM, DINUCLEAR COMPLEX, PYRIDINE P, ETHANEDIAMINE P, MAGNETISM, NICKEL COMPLEX, CRYSTAL STRUCTURE