| Autor: |
Dmitry, Guk, Alexei, Naumov, Olga, Krasnovskaya, Viktor, Tafeenko, Anna, Moiseeeva, Vladimir, Pergushov, Michail, Melnikov, Nikolai, Zyk, Alexander, Majouga, Elena, Belolglazkina |
| Rok vydání: |
2020 |
| Zdroj: |
Dalton transactions (Cambridge, England : 2003). 49(41) |
| ISSN: |
1477-9234 |
| Popis: |
The reactions of (Z)-3-aryl-2-(methylthio)-5-(pyridine-2-ylmethylene)-3,5-dihydro-4H-imidazol-4-ones (3) with CuCl2·2H2O in the presence of a reducing solvent (alcohol or dimethylformamide (DMF)) produce three types of Cu-containing compounds: two Cu complexes with a composition of CuII(3)Cl2 (4) and CuI(3)Cl (5) as well as a salt (3 + H)+CuICl2- (6) in a 4 : 5 : 6 ratio depending on the substituent at the N(3) nitrogen atom of the ligand moiety. In non-reducing solvents (dimethyl sulfoxide (DMSO) and CHCl3/acetone), only complexes 4 were formed, All three Cu derivatives (4, 5, and 6) were characterized by single-crystal X-ray diffraction, UV/vis spectroscopy, and electrochemistry data. Convenient electrochemical and UV-vis spectral criteria were recorded, which made it possible to distinguish between the different Cu-containing compounds. Based on the electron spectroscopy and electron paramagnetic resonance (EPR) data, a possible scheme for the formation of compounds 4-6 was proposed, including the initial coordination of copper(ii) chloride with an organic ligand, the subsequent reduction of the resulting complex 4 by DMF with the formation of salt 6, and the further transition of salt 6 into the complex 5. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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