Dielectric constant dependence of formation constants: complexation of dioxovanadium(V) with cysteine

摘要: The complexation of dioxovanadium(V) with L-cysteine was investigated in mixed solvent systems methanol + water and dioxane + water at 25°C 0.1 mol dm−3 ionic media, using a combination potentiometric spectrophotometric techniques. Sodium perchlorate solution used to maintain the strength. compositions formed complexes were determined, it shown that dioxovanadium(V), VO , forms two mononuclear species ligand. stability constants are given above media interpreted. Linear relationships observed when plotted log β versus 1/D, where β D represent formation dielectric constants, respectively. results discussed terms effect on mole fraction both for protonation cysteine. An attempt has been made ascertain nature correction factor determining pH solutions increasing organic l...