Stability constants of Nicotinic acid (vitamin B3) complexes with transition metal ions

Spectrophotometric Study of Stability Constants of Metal Complexes of Promethazine at Different Temperatures

The complexation reactions between Cu2+, Pd2+ and Ni2+ metal ions with promethazine (PM) in water or DMF were studied by the spectrophotometric methods at [(15, 25,35 and 45±0.1) °C]. The complexation process was optimized in terms of pH, temperature and contact time. The stoichiometry of the complex was found to be 1:1 (metal ion/ligand). The formation constants of the resulting complexes were...

Studies of binary complexes of transition metal ions with Gallic Acid by Potentiometry

1 P.G.Dept .Of Chemistry, Sir Syed College, Aurangabad, (M.S.) India 2 Dr Rafiq Zakaria College for Women, Aurangabad ,( M.S.) India 3 Dept .Of Chemistry, Milliya Senior College, Beed, (M.S.) India . Abstract: Phenolic acids are a complex group of substances that have gained enormous attention in the last years , because of their biological properties , especially from their importance as a sec...

Determination of the intrinsic stability constants of toxic divalent metal ions to alginic acid.

Study of stability constants of complex of N-benzothiazol-2-yl-3,5- disubstituted pyrazolines with some transition metal ions

The proton-ligand and metal-ligand stability constants of the complexes of Cu(II), Ni(II),Co(II) with 1-Benzothiazol2-yl-3-(2-hydroxy phenyl)-5-(4-methoxy phenyl) pyrazoline (L), 1-Benzothiazol-2-yl-3-(2-hydroxy phenyl)-5-phenyl pyrazoline (L), 1-Benzothiazol-2-yl-3-(2-hydroxy phenyl)-5-(4-chloro phenyl) pyrazoline(L), 1-Benzothiazol-2-yl3-(2-hydroxy-5-methyl phenyl)-5-(4-methoxy phenyl) pyrazo...

SPECTROPHOTOMETRIC STUDY OF THE STOICHIOMETRY AND CONDITIONAL STABILITY CONSTANTS OF SOME TRIVALENT METAL ION COMPLEXES OF METHYLTHYMOL BLUE

Complexation reactions between methylthymol blue and Fe , A l ,Ga , 1n a nd TI ions have been studied in buffer aqueous solutions of pH 5.0 at 2S°C by a spectrophotometric technique. The conditional stepwise stability constants of the resulting 1:l and 1:2 (metal-to-ligand) complexes were determined from the absorbance-mole ratio data at three different wavelengths of the visible sp...