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Synthesis, characterization and redox behavior of bis(N-1-adamantanyl- and N-2-adamantanyl-3,5- t Bu2-salicylaldiminato)copper(II) complexes.
- Source :
-
Polyhedron . Aug2007, Vol. 26 Issue 13, p3129-3135. 7p. - Publication Year :
- 2007
-
Abstract
- Two new bulky ligands, N-(1-adamantyl)-3,5-tBu2-salicylaldimine (1), and N-(2-adamantyl)-3,5-tBu2-salicylaldimine (2), and their copper bis-chelate complexes, 3 and 4, have been prepared and their analytical, spectroscopic and magnetic properties, chemical and electrochemical redox reactivity are described. EPR and UV/Vis results [higher g∥/A∥, lower energy λ (nm)] for 3 and 4 suggest a distorted square planar geometry with a higher degree of distortion for 3 than for 4. Chemical oxidation of 1–4 by ACN, on the basis of their EPR and UV/Vis spectra results in the formation of the free 1+, 2+ phenoxyl and Cu(II)-phenoxyl radicals complexes [g = 2.0065 (3+), 2.0099 (4+) and λmax at ca. 430 and 720 nm]. Electrochemical studies have shown that the complexes possess ligand- and copper(II)-centered quasi-reversible and irreversible responses and the more distorted complex 3, having the bulkier 1-adamantyl on the imine nitrogen, was reduced at a more negative potential than the less distorted complex 4. [Copyright &y& Elsevier]
- Subjects :
- *LIGANDS (Chemistry)
*ADAMANTANE
*COPPER
*OXIDATION-reduction reaction
Subjects
Details
- Language :
- English
- ISSN :
- 02775387
- Volume :
- 26
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- Polyhedron
- Publication Type :
- Academic Journal
- Accession number :
- 25843311
- Full Text :
- https://doi.org/10.1016/j.poly.2007.02.012