Abstract
Six new copper complexes of di-2-pyridyl ketone nicotinoylhydrazone (HDKN) have been synthesized. The complexes have been characterized by a variety of spectroscopic techniques and the structure of [Cu(DKN) 2]·H 2O has been determined by single crystal X-ray diffraction. The compound [Cu(DKN) 2]·H 2O crystallized in the monoclinic space group P2 1 and has a distorted octahedral geometry. The IR spectra revealed the presence of variable modes of chelation for the investigated ligand. The EPR spectra of compounds [Cu 2(DKN) 2(μ-N 3) 2] and [Cu 2(DKN) 2(μ-NCS) 2] in polycrystalline state suggest a dimeric structure as they exhibited a half field signal, which indicate the presence of a weak interaction between two Cu(II) ions in these complexes.
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