Poly(styrene-alt-maleic acid)-metal complexes with divalent metal ions. synthesis, characterization, and physical properties

2001 ◽  
Vol 81 (6) ◽  
pp. 1310-1315 ◽  
Author(s):  
Bernab� L. Rivas ◽  
Gloria V. Seguel ◽  
Kurt E. Geckeler
Keyword(s):  
Physical Properties ◽  
Metal Ions ◽  
Metal Complexes ◽  
Maleic Acid ◽  
Divalent Metal ◽  
Divalent Metal Ions

Stability constants and spectral studies of complexes of 2-hydroxy-5-methylazobenzene-2′-carboxylic acid with some divalent metal ions

1984 ◽  
Vol 62 (11) ◽  
pp. 2299-2301
Author(s):  
C. Mahalingam ◽  
J. K. Sthapak ◽  
D. D. Sharma ◽  
R. L. Tiwari ◽  
Smita Sthapak
Keyword(s):  
Carboxylic Acid ◽  
Metal Ions ◽  
Metal Complexes ◽  
Stability Constants ◽  
Divalent Metal ◽  
Reflectance Spectra ◽  
Spectral Studies ◽  
Divalent Metal Ions ◽  
The Stability

The stability constants of metal complexes of 2-hydroxy-5-methylazobenzene-2′-carboxylic acid have been determined spectrophotometrically. These follow the Irving–Williams sequence: log KOH(H) = 10.67, log K1(Co) = 9.02, log K1(Ni) = 9.68, log K1(Cu) = 13.37, log K1(Zn) = 7.58, and [Formula: see text]The chelates of Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), and [Formula: see text] with the dye have been prepared and characterized on the basis of their ir and reflectance spectra.

scholarly journals Synthesis and Characterization of a NewN"-[(1Z,2E)-2- (Hydroxyimino)-1-phenylpropylidene]-N"'-[(1E)-phenylmethylene]thiocarbonohydrazide and its Complexes with Co(II), Ni(II) and Cu(II)

2010 ◽  
Vol 7 (2) ◽  
pp. 409-418
Author(s):  
Dilip C. Sawant ◽  
A. Venkatchallam ◽  
R. G. Deshmukh
Keyword(s):  
Electrical Conductivity ◽  
Metal Ions ◽  
Metal Complexes ◽  
Magnetic Measurements ◽  
Divalent Metal ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
Divalent Metal Ions ◽  
First Time

Synthesis and characterization of a newN"-[(1Z,2E)-2- (Hydroxyimino)-1-phenylpropylidene]-N"'-[(1E)-phenylmethylene]thiocarbonohydrazide and its metal complexes with Co(II), Ni(II) and Cu(II) metal ions. The ligand synthesis and characterization is reported for first time. The complexes of divalent metal ions were synthesized in 1:2 molar proportion using ethanol as solvent. The ligands as well as its metal complexes were characterized using various physicochemical techniques such as elemental analysis, spectral and magnetic measurements and electrical conductivity measurements in case of the metal complexes only. The data for the metal complexes reveals that they may be represented by ML2. The metal complexes show interesting features of coordination structure.

scholarly journals Metal complexes of triazine - Schiff bases: Spectroscopic and thermodynamic studies of complexation of some divalent metal ions with 3-(α-acetylethylidenehydrazino)-5,6-diphenyl-1,2,4-triazine

1999 ◽  
Vol 64 (10) ◽  
pp. 621-635 ◽  
Author(s):  
M. Mashaly ◽  
H.A. Bayoumi ◽  
A. Taha
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
Metal Complexes ◽  
Water Solution ◽  
Formation Constants ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Different Temperatures ◽  
Metal Ligand ◽  
Cu And Zn

Metal complexes of some divalent metal ions (Co, Ni, Cu and Zn) with 3-(?- acetylethylidenehydrazino)-5,6-diphenyl-1,2,4-triazine (AHDT) as a Schiff-base have been investigated potentiometrically and spectrophotometrically and found to have the stoichiometric formulae 1:1 and 1:2 (M:L). The formation constants of the proton-ligand and metal-ligand complexes have been determined potentiometrically at different temperatures (10, 20, 30, 40 and 50?C) at an ionic strength of 0.1MKNO3 in 75%(v/v) dioxane-water solution. The standard thermodynamic parameters, viz. ?Go, ?Ho, and ?So, for the proton-ligand and the stepwise metal-ligand complexes have been evaluated.

Spectroscopic and thermodynamic studies of complexation of some divalent metal ions with isatin-β-thiosemicarbazone

2007 ◽  
Vol 61 (6) ◽  
Author(s):  
S. Konstantinović ◽  
B. Radovanović ◽  
Z. Todorović ◽  
S. Ilić ◽  
B. Konstantinović
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
Metal Complexes ◽  
Dissociation Constants ◽  
Water Solution ◽  
Molecular Complexes ◽  
Formation Constants ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Different Temperatures

AbstractMetal complexes of some divalent metal ions (Co, Ni, Cu, Zn, Hg, and Pd) with isatin-β-thiosemicarbazone (ITS) as the Schiff base have been investigated potentiometrically and spectrophotometrically. The dissociation constants of the ligand and formation constants of the metal complexes, as well as the corresponding thermodynamic functions (ΔG, ΔH and ΔS) have been determined at different temperatures in ethanol—water solution. The full stability constants were also evaluated spectrophotometrically by the Job method. The experimental results indicate that Cu(II), Zn(II), Pd(II), and Hg(II) form one-to-one molecular complexes (ML) with the studied ligand, whereas Co(II) and Ni(II) form both ML and ML2 species.

Interaction of divalent metal ions with the NADP+-malic enzyme from maize leaves

1991 ◽  
Vol 81 (4) ◽  
pp. 462-466 ◽  
Author(s):  
Maria Fabiana Drincovich ◽  
Alberto A. Iglesias ◽  
Carlos S. Andreo
Keyword(s):  
Metal Ions ◽  
Malic Enzyme ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Maize Leaves
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