The potentiometric study of Co(II) complexes with mercaptocarboxylic acids
Streszczenie
The interaction between Co(II) ions and thiolactic
acid TLA or thioglycolic acid TGA in aqueous 0.1 M NaClO₄
has been studied potentiometrically at 20°. The formation of complexes of the type Co(SRC00) and Co(SRC00)²⁻₂
(where R - CH₂ or CH₃CH) has been found. The stability
constants of these complexes have been determined as well
as the acid dissociation constants of TLA and TGA.
Thiolactic acid and thioglycolic acid, belong to a
physiologically important class of compounds. As they
behave as strong complexing agents, it seemed to be interesting to comparise the stabilities of Co(II) complexes
with these acids.