Electrophoretic Studies of Binary and Ternary Complexes of Some Metal Ions with Alizarin

The formation constants of the binary 1:1 and 1:2 complexes of Cu(II), Zn(II), Cd(II), Hg(II), and Pb(II) withN-acetylcysteine (NAC) and 1:1:1 ternary complexes of the said metal ions with NAC as a primary ligand and some biologically important amino acids as secondary ligands have been determined potentiometrically in aqueous medium. Acid dissociation constants of the ligands used and the formation constants of the binary and the ternary complexes were determined at 25 °C and in ionic strength I=0.1 mol dm-3(KNO3).The formation constants of the 1:1 complexes were found to be higher than 1:2 complexes and the metal ions follow the order Hg(II) >Cu(II) >Cd(II) >Zn(II). In addition UV-spectral studies of the NAC-Metal (II) complexes have also been conducted at appropriate pH values to give further information about the structural nature of NAC- Metal (II) complexes in aqueous medium.

Download Full-text

Binary and ternary complexes of metal ions, nucleoside 5′-monophosphates, and amino acids

Journal of Inorganic and Nuclear Chemistry ◽

10.1016/0022-1902(80)80232-6 ◽

1980 ◽

Vol 42 (5) ◽

pp. 785-792 ◽

Cited By ~ 21

Author(s):

James B. Orenberg ◽

Beda E. Fischer ◽

Helmut Sigel

Keyword(s):

Amino Acids ◽

Metal Ions ◽

Ternary Complexes ◽

Binary And Ternary Complexes

Download Full-text

Potentiometric Studies on the Formation Equilibria of Binary and Ternary Complexes of Some Metal Ions with Dipicolinic Acid and Amino Acids

Journal of Chemical & Engineering Data ◽

10.1021/je000128w ◽

2000 ◽

Vol 45 (6) ◽

pp. 1108-1111 ◽

Cited By ~ 19

Author(s):

Mohamed M. Khalil ◽

Abeer E. Attia

Keyword(s):

Amino Acids ◽

Metal Ions ◽

Dipicolinic Acid ◽

Ternary Complexes ◽

Potentiometric Studies ◽

Binary And Ternary Complexes ◽

Formation Equilibria

Download Full-text

Synthesis, characterization, thermodynamics and biological studies of binary and ternary complexes including some divalent metal ions, 2, 3-dihydroxybenzoic acid and N -acetylcysteine

Journal of the Taiwan Institute of Chemical Engineers ◽

10.1016/j.jtice.2016.08.003 ◽

2016 ◽

Vol 68 ◽

pp. 23-30 ◽

Cited By ~ 2

Author(s):

Shella Permatasari Santoso ◽

Artik Elisa Angkawijaya ◽

Yi-Hsu Ju ◽

Felycia Edi Soetaredjo ◽

Suryadi Ismadji ◽

...

Keyword(s):

Metal Ions ◽

Divalent Metal ◽

Ternary Complexes ◽

Divalent Metal Ions ◽

Dihydroxybenzoic Acid ◽

Binary And Ternary Complexes ◽

Biological Studies

Download Full-text

Spectrophotometric Microdetermination of Thorium(IV) and Uranium(VI) with Chrome Azurol-S in Presence of Cationic Surfactant

E-Journal of Chemistry ◽

10.1155/2011/258782 ◽

2011 ◽

Vol 8 (3) ◽

pp. 1132-1141 ◽

Cited By ~ 6

Author(s):

A. B. Upase ◽

A. B. Zade ◽

P. P. Kalbende

Keyword(s):

Metal Ions ◽

Cationic Surfactant ◽

Bathochromic Shift ◽

Stoichiometric Composition ◽

Formation Constants ◽

Ternary Complexes ◽

Water Soluble ◽

Molar Ratio ◽

Chrome Azurol S ◽

Binary And Ternary Complexes

Cationic surfactant, cetyldimethylethylammonium bromide (CDMEAB), sensitize the color reactions of Th(IV) and U(VI) with chrome azurol-S(CRAS). Formation of water soluble deeply colored ternary complexes of metal ions show large bathochromic shift. Same stoichiometric composition of ternary complexes with 1:2:4 molar ratio (M-CRAS-CDMEAB) have been observed for both the metal ions and are responsible for enhancement in molar absorptivities and sensitivities at shifted wavelength. The ternary complexes of thorium(IV) and uranium(VI) exhibit absorption maxima at 640 and 620 nm with molar absorptivities 85500 and 69600 L.mol-1.cm-2respectively. Beer’s law were obeyed in concentration range 0.12-0.185 ppm for Th(IV) and 0.13-0.162 ppm for U(VI) in presence of CDMEAB. Conditional formation constants and various analytical parameters have been evaluated and compared the results of binary and ternary complexes. Enhancement in the molar absorptivities in presence of CDMEAB clearly indicated the usefulness of these colored reactions for microdetermination.

Download Full-text

Investigation of Extent of Interaction of Thiobarbituric Acid and Two Selected Amino Acids with Three Divalent Metal Ions in Aqueous-organic Medium at Different Temperatures

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2019/v36i330230 ◽

2019 ◽

pp. 1-8

Author(s):

M. A. Oladipo ◽

K. T. Ishola ◽

T. A. Ajayeoba

Keyword(s):

Metal Ions ◽

Thiobarbituric Acid ◽

Entropy Change ◽

Formation Constants ◽

Ternary Complexes ◽

Water Mixture ◽

Divalent Metal Ions ◽

Binary And Ternary Complexes ◽

Binary Complexes ◽

The Difference

The formation constants of binary and ternary complexes of Thiobarbituric acid as primary ligand and L-tyrosine and L-histidine as secondary ligands have been examined in 40% (v/v) ethanol-water mixture at 27oC and 35oC and at ionic strength of 0.02 NaNO3 by potentiometric method. The ligands formed 1:1 binary complexes with the metal ions. The primary and secondary ligands simultaneously coordinated to the metal ions to form 1:1:1 ternary complexes. The difference in stability constants of binary and ternary complexes were determined by DlogK and RS%. Ternary complexes exhibited enhanced stability than the binary complexes. The stability of the complexes decrease with increase in temperature. The thermodynamic parameters such as Gibb’s free energy change (ΔG), entropy change (ΔS) and enthalpy change (ΔH) accompany the interactions were evaluated. The interactions were found to be spontaneous, exothermic, and entropically favoured.

Download Full-text