New Sulfanyl- and Selanyl-Substituted Schiff BasesDerived from 2-Chalcogenoalkylamines and Aromatic Aldehydes.Synthesis and Complex Formation Reactionsстатья
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Дата последнего поиска статьи во внешних источниках: 20 сентября 2013 г.
Аннотация:Abstract—A number of β-phenyl(or benzyl)selanyl- and β-phenylsulfanyl-substituted imines possessing an
additional donor nitrogen, oxygen, or sulfur atom were synthesized by reaction of 2-phenylsulfanylethanamine,
2-phenylsulfanylcyclohexanamine, 2-phenylselanylcyclohexanamine, and 2-benzylselanylaniline with salicylaldehyde,
2-pyridinecarbaldehyde, or 2-tert-butylsulfanylbenzaldehyde. The resulting Schiff bases were tested
as ligands in the complex formation with nickel(II) and copper(II), and mononuclear (L–H)MCl or LMCl2
coordination compounds were isolated (L = sulfur- or selenium-containing imine). The redox properties of the
selenium-containing ligands and complexes were studied by cyclic voltammetry. The complexes were found to
undergo reduction of the metal ion in two one-electron steps. The reduction of the copper complexes is
reversible, and of the nickel complexes, irreversible.