Rdik And Nkd College

Amrāvati, India

Rdik And Nkd College

Amrāvati, India

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Thakur S.D.,Rdik And Nkd College | Munot K.P.,P.A. College | Deshmukh R.D.,Rdik And Nkd College | Tihile M.S.,Rdik And Nkd College
Journal of the Indian Chemical Society | Year: 2012

The solution studies (the proton-ligand stability constant pK and metal-ligand stability constants log K) of binary (1:1) complexes of Cr III and LaIII with 1-(2′-hydroxy-5′- bromophenyl)-3-(2′-chlorophenyl)-1,3-propanedione [HB2CP] [L1] and 1-(2′-hydroxy-5′-bromophenyl), 3-(4′-nitrophenyl)-1,3- propanedione [HB4NP] [L2] have been performed at 0.02 to 0.1 mol dm-3 ionic strength at (29 ± 0.1°C) in 70% dioxane-water mixture pH-metrically. The pK and log K values are utilized to estimate the thermodynamic stability constants at zero ionic strength and to know the exact nature of complexation equilibria.


Thakur S.D.,Rdik And Nkd College | Mahajan D.T.,Vidyabharti Mahavidyalaya | Munot K.P.,P.A. College | Deshmukh R.D.,Rdik And Nkd College | Tihile M.S.,Rdik And Nkd College
Der Pharma Chemica | Year: 2011

The interaction between Th(III), Sm(III), Nd(III) and Pr(III) Metal Ions And 2-Mercapto-4-(4'-Aminophenyl)-6-(2'-Hydroxy-5'-Bromophenyl)Pyrimidine[M4AHBP](L1) and 2-Mercapto-4-(2'-Chlorophenyl)-6-(2'-Hydroxy-5'-Bromophenyl)Pyrimidine[M2CHBP](L2) have been studied at 0.1 M Ionic Strength in 70 % Dioxane-water mixture by Bjerrum method as adopted by Calvin and Wilson. It is observed that Th(III), Sm(III), Nd(III) and Pr(III) Metal ions form 1:1 and 1:2 complexes with ligands (L1 & L2). The data obtained were used to estimate and compare the values of proton-ligand stability constant (pK) and metal-ligand stability constants (log k). From estimated data (pK and log k), the effects of substituents were studied.


Thakur S.D.,Rdik And Nkd College | Mahajan D.T.,Vidya Bharti College | Munot K.P.,P.A. College | Deshmukh R.D.,Rdik And Nkd College | And 2 more authors.
Der Pharma Chemica | Year: 2011

The solution studies (the proton-ligand stability constant pK and metal-ligand stability constants log k) of binary (1 : 1) complexes of Cr(III) and La(III) with 1(2'-Hydroxy-5'-Bromophenyl)-3-(4'-chlorophenyl)-1,3-Propanedione [HB4CP] [L 1] and 1(2'-Hydroxy-5'-Bromophenyl), 3-(4'-Aminophenyl)-1,3-Propanedione [HB4AP] [L 2] have been performed at 0.02 to 0.1 mol.dm -3 ionic strength at (29 ±?0.1)°C in 70 % dioxane-water mixture pH-metrically. The pk and log k values are utilized to estimate the thermodynamic stability constants at zero ionic strength and to know the exact nature of complexation equilibria.

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