Abstract
Mixed complexes of Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) ions with 6-aminopurine (adenine, ADN) and uracil (URL) were prepared from aqueous ethanol solution at pH about 7. The new complexes have the formulae M 2(ADNURL)(OH) 2·H 2O for M = Mn(II), Zn(II), Cd(II) and M 2(ADNURL)(OH) 4·3H 2O for M = Co(II), Ni(II), Cu(II). The mixed complexes were characterized by elemental, infrared, electronic, ESR spectral and magnetic measurements. ADN behaves as a bidentate ligand. The probable binding sites of ADN are N 3 and N 7 nitrogens and of URL is C 2O. Polymeric structures have been suggested with ADN and OH as the bridging ligands.
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