Crystal structure and magnetic properties of bis(2,2′-bipyridine) azido copper(II) perchlorate

The title compound has been synthesized and its crystal structure has been solved at room temperature. It crystallizes in the triclinic system, space groupPĪ, witha=7.853(1) Å,b=10.177(1) Å,c=13.651(4) Å,α=74.57(1)°,β=88.49(1)°, γ=80.675(4)°, andZ=2. The structure consists of isolated [Cu(bipy)2N3]+ cations (bipy=2,2′-bipyridine) and perchlorate anions. The metallic cation environment has a distorted trigonal-bipyramidal geometry. The EPR spectrum is rhombic, which indicates that the distortion with respect to the perfect trigonal bipyramid is sufficiently pronounced to mixz2- andx2−y2-type orbitals in the ground state. The temperature dependence of the molar magnetic susceptibility has been investigated in the 300-2.2 K temperature range.