Abstract: Using phenanthroline(phen) as an auxiliary azidebridging ligand, a Co2+ coordination polymer [Co2(μ1,1-N3)2(phen)2(N3)2], was prepared hydrothermally. The complex was characterized by IR, elemental analysis, X-ray single crystal diffraction. The bridging manner of azide in this complex was discussed and the magnetic properties were measured. The complex belongs to the triclinic system(space group of P1) with a=0.69272(14) nm, b=1.0318(2) nm, c=1.0381(2) nm, α=64.47(3)°, β=71.02(3)°, γ=85.79(3)°, Z=1, V=0.6312(2) nm3, D=1.701 mg/m3, F(000)=326.

Key words: Coordination polymer, Azide, Crystal Structures, Magnetis