Synthesis, spectroscopy and redox chemistry of bis(N-aryl-3,5-di-tert-butylsalicylaldiminato)-copper(II) complexes

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dc.contributor.authorKasumov, VT
dc.contributor.authorKoksal, F
dc.contributor.authorKoseoglu, R
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2004
dc.departmentNiğde ÖHÜ
dc.description.abstractA series of new bis(N-aryl-3,5-di-tert-butylsalicylaldiminato)copper(II) complexes (I), prepared from 3,5-di-tert-butylsalicylaldehyde and mono-substituted anilines, X-C6H4NH2 (X = H, o-F, Cl, Br, CH3, CH3O; p-F, Cl, Br, CH3, CH3O, t-Bu and 5,6-benzo), and their spectroscopic properties as well as electrochemistry and reactivity toward PPh3 are described. Comparison of g(parallel to) (2.223-2.249), A(parallel to) (150-170 G) tensors and the axial symmetry parameter, g(parallel to)/A(parallel to), (140-155 cm) of I with those of model Cu(II) complexes reveals that the coordination site is distorted from square planar toward tetrahedral geometry. The di-tert-butyl groups on the salicylaldehyde moiety unlike those introduced on the aniline rings do not facilitate reactivity toward PPh3. Electrochemical studies of I in acetonitrile solutions reveal highly irreversible behavior, due to chemical or stereochemical changes subsequent to electron transfer. In the oxidation of some complexes with (NH4)(2)Ce(NO3)(6) in acetonitrile at 300 K, along with decreasing ESR signals of Cu(II), the appearance of coordinated phenoxyl radical signals centered at g = 2.004 were detected. The CV studies on acetonitrile solutions of I revealed well-resolved quasi-reversible redox waves at E-1/2(1) = 0.61-0.99 V and E-1/2(1) = 1.09-1.23 V (vs. Ag/AgCl) attributable to ligand-centered oxidation processes to yield corresponding coordinated phenoxyl radical species such as Cu(II)(phenoxyl)(phenolate) and Cu(II)(phenoxyl)(2).
dc.identifier.doi10.1080/0095897042000216575
dc.identifier.endpage603
dc.identifier.issn0095-8972
dc.identifier.issue7
dc.identifier.scopus2-s2.0-3142762335
dc.identifier.scopusqualityQ3
dc.identifier.startpage591
dc.identifier.urihttps://dx.doi.org/10.1080/0095897042000216575
dc.identifier.urihttps://hdl.handle.net/11480/5661
dc.identifier.volume57
dc.identifier.wosWOS:000222783800006
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherTAYLOR & FRANCIS LTD
dc.relation.ispartofJOURNAL OF COORDINATION CHEMISTRY
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectbis(N-aryl-3,5-di-tert butylsalicylaldiminato)copper(II) complexes
dc.subjectoptical and ESR spectra
dc.subjectredox reactivity
dc.subjectcyclic voltammetry
dc.titleSynthesis, spectroscopy and redox chemistry of bis(N-aryl-3,5-di-tert-butylsalicylaldiminato)-copper(II) complexes
dc.typeArticle

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