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Dinuclear chelates of acyclic and cyclic tridentate Schiff bases derived from sterically hindered o-aminophenols. A new type of reactivity of tridentate ligands under electrosynthesis conditions |
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| Authors: | T. O. Shmakova D. A. Garnovskii K. A. Lyssenko E. P. Ivakhnenko V. V. Krasnikov V. I. Simakov I. S. Vasil’chenko A. I. Uraev A. S. Burlov E. V. Sennikova A. S. Bogomyakov M. Yu. Antipin A. D. Garnovskii I. E. Uflyand |
| Affiliation: | 1. Pedagogical Institute of Southern Federal University, 35 ul. B. Sadovaya, 344010, Rostov-on-Don, Russian Federation 2. Institute of Physical and Organic Chemistry, Rostov State University, 194/2 prosp. Stachki, 344090, Rostov-on-Don, Russian Federation 3. Southern Scientific Center, Russian Academy of Sciences, 41 prosp. Chekhova, 344006, Rostov-on-Don, Russian Federation 4. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 ul. Vavilova, 119991, Moscow, Russian Federation 5. Department of Chemistry, Southern Federal University, 7 ul. Zorge, 344090, Rostov-on-Don, Russian Federation 6. International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3a ul. Institutskaya, 630090, Novosibirsk, Russian Federation |
| Abstract: | The chemical and electrochemical synthesis of cobalt(II), nickel(II), and copper(II) complexes based on sterically hindered tridentate Schiff bases obtained by the coupling of 2-amino-4,6-di-tert-butylphenol with salicylaldehyde derivatives (H2L, H2L’) was performed. The resulting dinuclear complexes were characterized by elemental analysis, IR spectroscopy, and magnetochemical measurements in the 300–2 K temperature range. The structures of the dinuclear nickel(II) and copper(II) complexes with the composition Ni2L2·2AcOH·2MeOH and Cu2L2, respectively, were established by X-ray diffraction. The copper chelates are characterized by the presence of antiferromagnetic exchange interactions. The mononuclear copper(II) complexes (DMSO)bis[2-(5,7-di-tert-butyl-4-hydroxybenzoxazol-2-yl)phenolato]copper(II) and (DMF)2bis[2-(5,7-di-tert-butyl-4-hydroxybenzoxazol-2-yl)phenolato]copper(II) were isolated upon electrochemical dissolution of copper(0) and were structurally characterized. |
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