Complexes of Co(II), Ni(II), and Cu(II) with 4-(3,4-dichlorophenyl)-1,2,4-triazole
摘要:
Novel oligonuclear complexes of Co(II), Ni(II), and Cu(II) with 4-(3,4-dichlorophenyl)-1,2,4-triazole (L) of the composition [M3L10(H2O)(2)](NO3)(6) (M = Co(II), Ni(II)), [Ni3L6(H2O)(6)]Hal(6) (Hal = Cl-, Br-), and [Cu5L16(H2O)(2)](NO3)(10)center dot 2H(2)O were synthesized and studied by magnetic susceptibility, electronic and IR spectroscopy, and powder X-ray diffraction methods. All the above complexes are X-ray amorphous. Antiferromagnetic exchange interactions between the M2+ ions were discovered in the [Co3L10(H2O)(2)](NO3)(6) and [Ni3L10(H2O)(2)](NO3)(6) complexes, whereas ferromagnetic exchange interactions were observed in the complexes [Ni3L6(H2O)(6)]Cl-6, [Ni3L6(H2O)(6)]Br-6, and [Cu5L16(H2O)(2)](NO3)(10)center dot 2H(2)O.