TY - JOUR
T1 - Three new vic-dioxime ligands
T2 - Synthesis, characterization, spectroscopy, and redox properties of their mononuc ear nickel(II) complexes
AU - Kilic, Ahmet
AU - Tas, Esref
AU - Gumgum, Bahattin
AU - Yilmaz, Ismail
PY - 2007
Y1 - 2007
N2 - Nickel(II) complexes with three new vic-dioxime reagents, N-(ethyl-4-amino-1-piperidine carboxylate)phenylglyoxime (L1H 2), N-(ethyl-4-amino-1-piperidirie carboxylate)glyoxime (L 2H2) and N,N′-bis(ethyl-4-amino-1-piperidine carboxylate)glyoxime (L3H2), have been prepared. Mononuclear nickel(II) complexes with a metal/ligand ratio of 1:2 were prepared using Ni(II) salt. All these nickel(II) complexes are nonelectrolytes as shown by their molar conductivities (ΛM) in DMF solution at 10 -3 M concentration. The ligands are soluble in common solvents such as DMSO, DMF, CHCl3, and C2H5OH. The ligands and their Ni(II) complexes were characterized by elemental analyses, FT-IR, UV-visible, 1H NMR, 13C NMR, magnetic susceptibility measurements, cyclic voltammetry, and molar conductivities (Λ M). The cyclic voltammetric measurements show that [Ni(L 1H)2] and [Ni(L2H)2] complexes exhibit almost similar electrochemical behavior, with two reduction and two oxidation processes based on either metals or oxime moities, while [Ni(L 3H)2·2H2O] complex displays irreversible, with one reduction and one oxidation processes based on oxime moity. This main difference could be attributed to the highly polarized [Ni(L3H)2·2H2O] complex that has four carboxylate groups attached to piperidine on the oxime moieties.
AB - Nickel(II) complexes with three new vic-dioxime reagents, N-(ethyl-4-amino-1-piperidine carboxylate)phenylglyoxime (L1H 2), N-(ethyl-4-amino-1-piperidirie carboxylate)glyoxime (L 2H2) and N,N′-bis(ethyl-4-amino-1-piperidine carboxylate)glyoxime (L3H2), have been prepared. Mononuclear nickel(II) complexes with a metal/ligand ratio of 1:2 were prepared using Ni(II) salt. All these nickel(II) complexes are nonelectrolytes as shown by their molar conductivities (ΛM) in DMF solution at 10 -3 M concentration. The ligands are soluble in common solvents such as DMSO, DMF, CHCl3, and C2H5OH. The ligands and their Ni(II) complexes were characterized by elemental analyses, FT-IR, UV-visible, 1H NMR, 13C NMR, magnetic susceptibility measurements, cyclic voltammetry, and molar conductivities (Λ M). The cyclic voltammetric measurements show that [Ni(L 1H)2] and [Ni(L2H)2] complexes exhibit almost similar electrochemical behavior, with two reduction and two oxidation processes based on either metals or oxime moities, while [Ni(L 3H)2·2H2O] complex displays irreversible, with one reduction and one oxidation processes based on oxime moity. This main difference could be attributed to the highly polarized [Ni(L3H)2·2H2O] complex that has four carboxylate groups attached to piperidine on the oxime moieties.
UR - http://www.scopus.com/inward/record.url?scp=34548834729&partnerID=8YFLogxK
U2 - 10.1002/hc.20357
DO - 10.1002/hc.20357
M3 - Article
AN - SCOPUS:34548834729
SN - 1042-7163
VL - 18
SP - 657
EP - 663
JO - Heteroatom Chemistry
JF - Heteroatom Chemistry
IS - 6
ER -