Related Experiment Video
Updated: Jun 28, 2026

Anticancer Metal Complexes: Synthesis and Cytotoxicity Evaluation by the MTT Assay
Published on: November 10, 2013
Equilibrium studies of organotin(IV) complexes with vitamin B(6)
M M Shoukry1, E M Khairy, M M Mohamed
1Department of Chemistry, Faculty of Science, Cairo University, Giza, Cairo, Egypt.
Abstract:
The complex-formation equilibria of dimethyltin(IV), trimethyltin(IV) and tributyltin(IV) with pyridoxamine were investigated in dioxane-water mixtures and at different temperatures using a potentiometric technique. The stepwise formation constants of the complexes formed in solution were calculated using the non-linear least-square program MINIQUAD-75. The effect of dioxane as a solvent on the protonation constants of pyridoxamine and the formation constants of organotin(IV) complexes was discussed. The thermodynamic parameters DeltaH degrees and DeltaS degrees calculated from the temperature dependence of the equilibrium constants were investigated. The concentration distribution of the various complex species was evaluated as a function of pH.
Related Concept Videos
Complexation Equilibria: Overview
The equilibrium constant of the complexation reaction is represented as the formation constant...
Formation of Complex Ions
Complexation Equilibria: The Chelate Effect
Complexation Equilibria: Factors Influencing Stability of Complexes
EDTA: Auxiliary Complexing Reagents
Calculating Equilibrium Concentrations
A more...
