828248-35-7Relevant academic research and scientific papers
Synthesis, structures and X-/Q-band EPR-investigations of N,N-diethyl-N′-3,5-di(trifluoromethyl)benzoylthiourea complexes of Cu II, NiII and PdII. EPR spectroscopic evidence of a CuII-CuII dimer
Kampf, Michael,Richter, Rainer,Gerber, Stefan,Kirmse, Reinhard
, p. 1437 - 1443 (2004)
The synthesis and the structures of (i) the ligand N,N-Diethyl-N′-3, 5-di(trifluoromethyl)benzoylthiourea HEt2dtfmbtu and (ii) the Ni II and PdII complexes of HEt2dtfmbtu are reported. The ligand coordinates bidendate forming bis chelates. The Ni II and the PdII complexes are isostructural. The also prepared CuII complex could not be characterized by X-ray analysis. However, the preparation of diamagnetically diluted powders Cu/Ni-(Et 2dtfmbtu)2 and Cu/Pd(Et2dtfmbtu)2 suitable for EPR studies was successful. The EPR spectra of the Cu/Ni and Cu/Pd systems show noticeable differences for the symmetry of the CuS 2O2 unit in both complexes: the Cu/Pd system is characterized by axially-symmetric g and Acu tensors; for the Cu/Ni system g and ACu have rhombic symmetry. EPR studies on frozen solutions of the CuII complex show the presence of a Cu II-CuII dimer which is the first observed for Cu II acylthioureato complexes up to now. The parameters of the fine structure tensor were used for the estimation of the CuII-Cu II distance.
