Emine Özcan

Synthesis of Four New Substituted Arylaminoglyoximes and Their Complexes with Copper(II), Nickel(II), Cobalt(II), and Palladium(II)

Abstract Four new substituted aminoglyoximes, N-(4-sulfamido-phenyl) glyoxime (SAGH2), N-(4-nitrophenyl) aminoglyoxime (NGH2), N-(4-tolyl) aminoglyoxime (PTGH2) and N-(2-tolyl) aminoglyoxime (OTGH2) have been synthesized from anti-chloroglyoxime and the corresponding substituted amines. All these dioximes are in the trans-anti-form according to IR and NMR data. The complexes of these four ligands with Cu(II), Ni(II), Co(II) and Pd(II) are square planar H-bridged structures with a metal-ligand ratio of 1:2, except the Cu(II) complex of SAGH2 where the metal-liqand ratio is 1:1. In the case of NGH2, the 4-nitrophenylamino group is replaced by the -NH2 group when PdC12 dissolved in conc. ammonium hydroxide was used to prepare the palladium(II) complex. 1H-NMR, IR and UV-visible data of the new compounds are given.

Synthesis and characterization of 2,3-bis(hydroxyimino)-1,2,3,4-tetrahydro-pyrido[2,3-b]pyrazine and its nickel(II), cobalt(II), copper(II), palladium(II), cadmium(II) and cobalt(III) complexes

Summary2,3-Bis(hydroxyimino)-1,2,3,4-tetrahydro-pyrido[2,3-b]pyrazine (H2L), prepared from 2,3-diaminopyridine and cyanogen-di-N-oxide has been converted into nickel(II), palladium(II), copper(II), cobalt(II), and cobalt(III) complexes (H2L) with a 1∶2 metal:ligand ratio. The ligands coordinate through the two N atoms, as do most vicinal dioximes. [(LH)Cl(H2O)Cd], contains a six-membered chelate ring. [Co(HL)2(L′)Cl] has also been prepared using triphenylphosphine, triphenylarsine, thiophene and chloride as axial ligands. The structure of thevic-dioxime and its complexes are proposed on the basis of elemental analysis, i.r.,1H-n.m.r. and uv-visible measurements.

Synthesis of four new vic-dioximes and their nickel(II), cobalt(II), copper(II) and cadmium(II) complexes

Four unsymmetrical vic-dioximes: [L1H2] N-(4-butylphenyl)amino-amphi-glyoxime, [L2H2] N-(4-butylphenyl)amino-anti-glyoxime, [L3H2] N-(4-phenylazophenyl)amino-amphi-glyoxime and [L4H2] N-(4-phenylazophenyl)amino-anti-glyoxime have been prepared from amphi-chloroglyoxime, anti-chloroglyoxime, 4-butylaniline and 4-(phenylazo)aniline respectively. The complexes of these vic-dioximes with NiII, CoII, CuII and CdII ions have been investigated. All are insoluble in common solvents. Their i.r. spectra and elemental analyses are given, together with mass and 1H-n.m.r. spectra of the ligands.

Functionalization of polystyrene and adhesion studies

The adhesion capability of novel functional polystyrenes to metals and their capability to provide corrosion resistance to metals under various conditions have been investigated. The polyfunctional polystyrenes were prepared via reaction of the polystyrene with different functional groups [2-methyl-2,3-epoxy-6-octene-4-one (I), 2-methyl-2,3-epoxy-5,7-nonadien-4-one (II), 1-chloro-2,3-epoxy-5-chloromethyl-5-hexene (III), I-(Δ3-tetrahydrobenzaldoxime)-2,3-epoxy propane (IV), and maleic anhydride (V)] in the presence of catalysts. The results show that the addition of functional groups to the polystyrene increases its adhesion capability and corrosion resistance. This increase is attributed to the quantity and nature of the functional groups bonded to polystyrene.

Effects of the functional groups of polystyrene on its adhesion improvement and corrosion resistance

Novel functionalized polystyrenes having groups such as epichlorohydrin, epoxy, acetyl, C=C double bond, and carboxyl were synthesized by the reaction of polystyrene with epichlorohydrin, unsaturated hydrocarbons, and organic anhydrides in the presence of Lewis acid catalysts. The adhesion capability and corrosion resistance of the new synthesized functionalized polystyrenes to metals under various conditions were investigated. A very good relationship was observed between the quantity of functional groups bonded to the aromatic rings of the polystyrenes and the adhesion and corrosion resistance properties of the polyfunctionalized polystyrenes. It was also observed that the new polyfunctionalized polystyrenes obtained by chemical modification with maleic anhydride, acetic anhydride, isoprene, butadiene, and epichlorohydrin in the presence of cationic catalysts resulted in high adhesion and anti-corrosion properties.

Synthesis and Complex Formation of Substituted Aminoglyoximes of Unsymmetrical VIC-Dioximes

Abstract Three new substituted aminoglyoximes, p-chloroanilinoglyoxime (p-CAGH2), o-chloroanilinoglyoxime (o-CAGH2), m-chloroanilinoglyoxime (m-CAGH2) have been synthesized from anti-chloroglyoxime (m-CAGH2) and the corresponding substituted amines. The Ni(II) and Cu(II) complexes of these ligands are square-planer while the Co(II) complexes are octahedral with water molecules as axial ligands. 1H-NMR, mass, IR spectra and elemental analyses data of the new compounds are given.

Synthesis and Complex Formation of New Unsymmetrical vic-Dioximes

Abstract anti-p-Chlorophenylchloroglyoxime : CgHgCl2N2O2) has been synthesized by chlorination of anti-p-chlorophenylglyoxime. The reaction of C8H6Cl2N2O2 with aryl-or arylalkylamines in ethanol between-10°C and -15°C gives unsymmetrical vic-dioximes, namely, anilino-p-chlorophenylglyoxime (L1H2), benzylamino-p-chloro-phenylglyoxime (L2H2), p-toluidino-p-chlorophenylglyoxime (L3H2), p-anisidino-p-chlorophenylglyoxime (L4H2). The Ni(II) and Cu(II) complexes of these ligands are square-planar while the Co(II) complexes are octahedral with water molecules as axial legends. 1H NMR, IR and UV-vis data are given.

THE SYNTHESIS AND Ni(II), Co(II), Cu(II), Cd(II), AND Zn(II) COMPLEXES OF TWO NEW UNSYMMETRICAL vic-DIOXIMES

Two new substituted aminoglyoximes, N-(4-ethylphenyl)amino-amphi-glyoxime [L1H2] and N-(4-ethylphenyl)amino-anti-glyoxime [L2H2], have been synthesized from amphi-chloroglyoxime and anti-chloroglyoxime and 4-ethylanilin. The preparation of nickel(II), cobalt(II), copper(II), zinc(II) and cadmium(II) complexes of the amphi- and anti-isomers of these ligands are described. All of these complexes are insoluble in common solvents. IR spectra and elemental analyses data of these complexes are given. Also, mass and 1H NMR spectra of these ligands are presented.

Synthesis of Novel Homo and Heterobimetallic Complexes of Ferrocenyl Formazans

Abstract 1-(o-Carboxyphenyl)-5-(p-hydroxy-o-carboxyphenyl)-3-ferrocenyl-formazan (HFF) and l-(o-carboxyphenyl)-5-(p-nitro-o-carboxyphenyl)-3-ferrocenylformazan (NFF) have been synthesized by the addition reaction of the diazonium salts of 2-amino-5-hydroxybenzoic acid, 2-ami-no-5-nitrobenzoic acid and ferrocenaldehyde-2-carboxyphenylhydrazone. The Ni(II), Pd(II), and Fe(II) complexes of HFF and NFF have also been obtained. The structures of formazans and their transition metal complexes were confirmed by elemental analyses, 1H and 13C-NMR, IR and UV-VIS. spectral data.

Synthesis, characterization, thermal, and redox properties of a vic-dioxime and its metal complexes

A new vic-dioxime ligand containing benzophenone hydrazone units, N′-(benzophenone hydrazone)glyoxime [LH2] has been prepared from benzophenone hydrazone and anti-chloroglyoxime in absolute ethanol. Mononuclear nickel(II), cobalt(II), copper(II), zinc(II), and cadmium(II) complexes were also synthesized. Ligand and complexes were characterized by elemental analyses, FT-IR, 1H NMR, and 13C NMR spectroscopy, magnetic moments, and DTA/TG techniques. On the basis of the magnetic and spectral evidences a square-planar geometry for Ni(II) and Cu(II) complexes, tetrahedral for Cd(II) and Zn(II) complexes, and octahedral for Co(II) complex were proposed. Redox behaviors of ligand and its complexes were also investigated by cyclic voltammetry at the glassy carbon electrode.