Determination of composition and instability constants of maltol complexes with iron(III) ions

Article abstract of DOI:10.1023/B:RUCB.0000037841.67079.2b

Complexation of maltol (MH) with Fe³⁺ ions in aqueous solutions was studied. The compositions of [FeMa]²⁺, [FeMa₂] ⁺, and [FeMa₃] complexes were determined by the method of isomolar series, and their instability constants were calculated. The values of the latter were confirmed by the method of apparent deviation from the Bouger - Lambert - Beer law. An increase in the Ma:Fe³⁺ ratio from 1 to 3 decreases the instability constants of the complexes. The [FeMa₃] complex can be considered as a basis for the antianemic drug with a prolonged effect.