Synthesis and characterization of iron(II) and iron(III) complexes with a tridentate O,N,O′-ligand

摘要: Abstract The coordination chemistry of the ligand precursor 1-benzoyl-4,5-dihydro-3,5-bis(trifluoromethyl)-1H-pyrazol-5-ol (1a) to iron(II) acetate was studied. In dependence added co-ligand different complex geometries were observed. case 4-dimethylaminopyridine (DMAP) as an octahedral found with O,N,O′-coordination tridentate (1a-2H), in which is planar, oxygen donors are trans each other, and nitrogen donor a cis position. other sites on iron center occupied by DMAP ligands. contrast that, triphenylphosphane oxidation process took place, revealed iron(III) comparable geometry for (O,N,O′-coordination, 1a-2H) demonstrating usefulness 1a-2H stabilize states. additional one oxide ethoxide Interestingly, ligands act bridging form bimetallic complex.