Synthesis, spectral characterization and electrochemical properties of new vic-dioxime complexes bearing carboxylate
[ X ]
Tarih
2006
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Three new vic-dioxime ligands, [N-(ethyl-4-amino-1-piperidine carboxylate)-phenylglyoxime ((LH2)-H-1), N-(ethyl-4-amino-1-piperidine carboxylate)-glyoxime (L(2)pH(2)), and N,N'-bis(ethyl-4-amino-1-piperidine carboxylate)-glyoxime ((LH2)-H-3)], and their Co(II) with Cu(II) metal complexes, were synthesized for the first time. Mononuclear complexes of these ligands with a 1:2 metal-ligand ratio were prepared with Co(II) and Cu(II) salts. The BF2+-capped Co(II) and mononuclear complexes of the vic-dioxime were prepared for [Co(L-1 center dot BF2)(2)] and [Co(L-2 center dot BF2)(2)]. The ligands act in a polydentate fashion bonding through nitrogen atoms in the presence of a base, as do most vic-dioximes. The cobalt(II) and copper(II) complexes are non-electrolytes as shown by their molar conductivities (Lambda(M)) in DMF. The structures of the ligands and complexes were determined by elemental analyses, FT-i.r., u.v.-vis., H-1- and C-13-n.m.r. spectra, magnetic susceptibility measurements, and molar conductivity. The comparative electrochemical studies show that the stabilities of the reduced or oxidized species and the electrode potentials of the complexes are affected by the substituents attached on the oxime moieties of the complexes.
Açıklama
Anahtar Kelimeler
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Kaynak
Transition Metal Chemistry
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
31
Sayı
5
