Author/Authors :
توكلي، هامان نويسنده Department of Chemistry, Science and Research Branch, Islamic Azad University, Khouzestan, Iran Tavakkoli, Haman , قايمي، آرزو نويسنده Department of Chemistry, Science and Research Branch, Islamic Azad University, Khouzestan, Iran Ghaemi, Arezoo , موهاو، فواد نويسنده Department of Chemistry, Science and Research Branch, Islamic Azad University, Khouzestan, Iran Mohave, Fouad
Abstract :
Two new oxo-centered trinuclear complexes, one of them a mixed-valence complex [Mn2MnO(CCl3CO2)6(Py)3] (1) and the other, mixed-metal complex of [Fe2MnO(CCl3CO2)6(H2O)3].NO3 (2) were synthesized by the direct reaction between metal nitrates and trichloroacetic acid. These complexes were characterized by elemental analyses (CHN), atomic absorption spectroscopy and spectral (IR, electronic) studies. These are new types of oxo-bridged mixed-metal complexes in which the carboxylate ligand is trichloroacetic acid. The UV spectra of the complexes exhibited strong bands in the region 213 and 257 nm which are related to the (? ? ?*) and (n ? ?*) transitions of the pyridine and H2O ligands, respectively. The IR spectra of these compounds showed two strong stretching vibrations bands, indicating a bridging coordination mode of the carboxylic group of the ligand in the complexes.
