The complexation reaction between salen (Bis(salicylidene)ethylenediamine) and Cu(II) cations in methanol (MeOH), 2-propanol (2-PrOH), acetonitrile (AN), tetrahydrofuran (THF), and chloroform (CHCl3) as nonaqueous solvents at 25º C has been investigated. The stoichiometry and formation constants of complexes have been determined spectrophotometrically and conductometrically by method of continu...

the complex-forming ability of 2-methyl-3-hydroxypyran-4-one ( 1a ), 2-ethyl-3-hydroxypyran-4-one ( 1b ), 1,2-dimethyl-3-hydroxypyridin-4-one ( 4a ) and 1-ethyl-2-methyl-3-hydroxypyridin-4-one ( 4b ) with nickel(ni(ii)) were characterized by infrared, ultraviolet, proton nuclear magnetic resonance spectroscopy and melting point. the mole-ratio of nickel:ligands was analyzed by atomic-absorption...

The precise analysis of redox chemistry of MN4-based macrocyclic complexes is of great importance because of stabilization of unusual oxidation states of metal ions by macrocyclic ligand and thus have various applications in biochemistry, electrochemistry, electrocatalysis, pharmaceuticals etc. In this work, MN4-macrocyclic complexes of Co (II) and Ni(II) transition metal ...

Some new symmetrical tetraaza Schiff base ligands containing 2-quinolinecarboxaldehyde moiety formed from condensation reaction of 2-quinolinecarboxaldehyde and o-phenylenediamine derivatives, such as N, Nˊ-bis(2-quinolylmethylidene)-4-methoxy-1, 2-phenylenediimine (L1), N, Nˊ-bis(2-quinolylmethylidene)-4-methy-1, 2-phenylenediimine (L2), N, Nˊ-bis(2-quinolylmethylidene)-4-chloro-1, 2-phenylene...

A new method for the determination of trace copper(II) in food samples by Cloud Point Extraction(CPE) combined with Flame Atomic Absorption Spectrometry(FAAS) is presented and evaluated. The method is based on the fact that hydrophobic complex of copper(II) with sodium diethyldithiocarbamate (DDTC) was formed at pH 6.0 and subsequently the hydrophobic complex was extracted into surfactant-r...

The reaction between Ni(II), Co(II), cr(III) bitrates, Ni(II) chloride and ambidentate a-keto ylide benzoylmethylenetriphenylphosphine (BPPY) resulted in isolation of [Ni(BPPY)2](NO3)2.2H2O, [Ni(BPPY)2]Cl2, [Co(BPPY)2](NO3)2 and [Cr(BPPY)3](NO<sub...

a new method for the determination of trace copper(ii) in food samples by cloud point extraction(cpe) combined with flame atomic absorption spectrometry(faas) is presented and evaluated. the method is based on the fact that hydrophobic complex of copper(ii) with sodium diethyldithiocarbamate (ddtc) was formed at ph 6.0 and subsequently the hydrophobic complex was extracted into surfactant-rich ...

some new symmetrical tetraaza schiff base ligands containing 2-quinolinecarboxaldehyde moiety formed from condensation reaction of 2-quinolinecarboxaldehyde and o-phenylenediamine derivatives, such as n, nˊ-bis(2-quinolylmethylidene)-4-methoxy-1, 2-phenylenediimine (l1), n, nˊ-bis(2-quinolylmethylidene)-4-methy-1, 2-phenylenediimine (l2), n, nˊ-bis(2-quinolylmethylidene)-4-chloro-1, 2-phenylene...

This study reports the synthesis of chitosan anchored Schiff base, ([2-oxo-1H-indol-3-ylidene] amino) chitosan and its Cu (II) metal complex. The complex was characterized by elemental analysis, FT-IR Spectrum, thermogravimetry analysis .The crystallinity of the compound was analyzed by powder X-ray diffraction technique. The catalytic efficiency of complex was studied in the oxidation of alcoh...

This study reports the synthesis of chitosan anchored Schiff base, ([2-oxo-1H-indol-3-ylidene] amino) chitosan and its Cu (II) metal complex. The complex was characterized by elemental analysis, FT-IR Spectrum, thermogravimetry analysis .The crystallinity of the compound was analyzed by powder X-ray diffraction technique. The catalytic efficiency of complex was studied in the oxidation of alcoh...