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Zinc– and Copper–Salicyaldimine complexes: Simultaneous observation of both metal–ligand coordination and weak CH⋯N contact about a single N-donor and the transmetallation reactions. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Smolyaninov IV, Poddel’sky AI, Burmistrova DA, Voronina YK, Pomortseva NP, Fokin VA, Tselukovskaya ED, Ananyev IV, Berberova NT, Eremenko IL. Heteroligand α-Diimine-Zn(II) Complexes with O,N,O'- and O,N,S-Donor Redox-Active Schiff Bases: Synthesis, Structure and Electrochemical Properties. Molecules 2022; 27:molecules27238216. [PMID: 36500309 PMCID: PMC9736860 DOI: 10.3390/molecules27238216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
A number of novel heteroligand Zn(II) complexes (1-8) of the general type (Ln)Zn(NN) containing O,N,O'-, O,N,S-donor redox-active Schiff bases and neutral N,N'-chelating ligands (NN) were synthesized. The target Schiff bases LnH2 were obtained as a result of the condensation of 3,5-di-tert-butyl-2-hydroxybenzaldehyde with substituted o-aminophenols or o-aminothiophenol. These ligands with combination with 2,2'-bipyridine, 1,10-phenanthroline, and neocuproine are able to form stable complexes upon coordination with zinc(II) ion. The molecular structures of complexes 4∙H2O, 6, and 8 in crystal state were determined by means of single-crystal X-ray analysis. In the prepared complexes, the redox-active Schiff bases are in the form of doubly deprotonated dianions and act as chelating tridentate ligands. Complexes 6 and 8 possess a strongly distorted pentacoordinate geometry while 4∙H2O is hexacoordinate and contains water molecule coordinated to the central zinc atom. The electrochemical properties of zinc(II) complexes were studied by the cyclic voltammetry. For the studied complexes, O,N,O'- or O,N,S-donor Schiff base ligands are predominantly involved in electrochemical transformations in the anodic region, while the N,N'-coordinated neutral nitrogen donor ligands demonstrate the electrochemical activity in the cathode potential range. A feature of complexes 5 and 8 with sterically hindered tert-butyl groups is the possibility of the formation of relatively stable monocation and monoanion forms under electrochemical conditions. The values of the energy gap between the boundary redox orbitals were determined by electrochemical and spectral methods. The parameters obtained in the first case vary from 1.97 to 2.42 eV, while the optical bang gap reaches 2.87 eV.
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Affiliation(s)
- Ivan V. Smolyaninov
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia
- Correspondence: (I.V.S.); (D.A.B.)
| | - Andrey I. Poddel’sky
- G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Str., 603137 Nizhny Novgorod, Russia
| | - Daria A. Burmistrova
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia
- Correspondence: (I.V.S.); (D.A.B.)
| | - Yulia K. Voronina
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prospekt 31, 119071 Moscow, Russia
| | - Nadezhda P. Pomortseva
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia
| | - Vasiliy A. Fokin
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia
| | - Ekaterina D. Tselukovskaya
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prospekt 31, 119071 Moscow, Russia
- Faculty of Chemistry, National Research University Higher School of Economics, 20 Myasnitskaya Str., 101000 Moscow, Russia
| | - Ivan V. Ananyev
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prospekt 31, 119071 Moscow, Russia
| | - Nadezhda T. Berberova
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia
| | - Igor L. Eremenko
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prospekt 31, 119071 Moscow, Russia
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Yang QZ, Yang YX, Kuang JH, Li ZY, Lin Yuan. The crystal structure of bis(( E)-2-((tert-butylimino)methyl)-4-chlorophenolato-κ 2
N,O)zinc(II), C 22H 26Cl 2N 2O 2Zn. Z KRIST-NEW CRYST ST 2022. [DOI: 10.1515/ncrs-2022-0049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C22H26Cl2N2O2Zn, monoclinic, P21/n (no. 14), a = 10.488(7) Å, b = 10.139(7) Å, c = 22.760(15) Å, β = 99.705°, V = 2386(3) Å3, Z = 4, R
gt
(F) = 0.0395, wR
ref
(F
2) = 0.1053, T = 296(2) K.
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Affiliation(s)
- Qian-Zhi Yang
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering , Yongzhou , Hunan 425199 , P. R. China
| | - Yu-Xin Yang
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering , Yongzhou , Hunan 425199 , P. R. China
| | - Jin-Hao Kuang
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering , Yongzhou , Hunan 425199 , P. R. China
| | - Zhong-Yan Li
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering , Yongzhou , Hunan 425199 , P. R. China
| | - Lin Yuan
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering , Yongzhou , Hunan 425199 , P. R. China
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