ماهنامه صنعت خوراک دام، طیور و آبزیان
پیاپی 33 (اسفند 1387)

Abstract: Our main objective is a better understanding of spin-spin interaction of dinuclear copper(II) complexes through bridging system. Three complexes of the type [Cu2(L)4(OH)2](X)2, where L is 2-amino-4-methylpyrimidine (abbreviated L) and X = NO3, ClO4 or CF3SO3 have been synthesized. The title compounds all consist of dinuclear units with hydroxo-bridging group. All complexes have been synthesized in one-step reaction, and characterized by elemental analysis, FTIR and electronic spectra and by magnetic properties. The compounds exhibit antiferromagnetic interaction at room temperature. The UV-Vis spectra show three absorption bands attributed to d-d transition of copper(II) ion, ligandmetal charge transition and * or n* transitions of ligand. The FTIR spectra indicate Cu2O2 ring vibrations in 570 400 cm1 range. The magnetic properties of [Cu2(L)4(OH)2](ClO4)2 has been investigated in 5265 K range and the singlettriplet energy gap of 240 cm1 was observed.