Synthesis and crystal structure of Cu(II) complex with 4-(pyridyl-2)-1,2,4-triazole

The synthesis and X-ray structure of new Cu(II) complex with 4-(pyridyl-2)-1,2,4-triazole (pytrz) are reported. The crystal structure of [Cu3(pytrz)8(H2O)4](NO3)6 has been determined by X-ray diffraction. Crystals are triclinic, space group P-1, unit cell parameters are: a=11.971(2), b=13.079(3), c=14.439(2) Å, α=114.03(1), β=97.79(1), γ=111.02(1)°, V=1819.2(6) Å3, Z=1, Rf=0.0706. The structure consists of linear trinuclear cations with a +6 charge and six noncoordinated NO3− anions. The central copper(II) atom is located on an inversion centre and is coordinated by six nitrogen atoms of pytrz molecules bridging via the nitrogen atoms in the N1, N2 positions. Each external copper(II) atom completes its coordination sphere with one monodentate pytrz via the nitrogen atom in the N1 position and two coordinated water molecules.