Stoichiometry of complexing of germanium with salicylfluorone in hydrochloric acid media
By spectrophotometry methods the stoichiometric coefficients have been found for the reagent and the metal in germanium salicylfluoronate depending on hydrochloric acid concentration, in absence of a stabilizer and without separation. It has been shown that in water media containing 3,8 per cent of ethanol in absence of a stabilizer, molecular chelates (addition compounds) of germanium with salicylfluorone are formed in the system. The stoichiometric coefficients for the reagent change from 4-5 (1,0 M HC1) to 3-4 (pH 1,6), while chelates association degree varies from 1,8 to 1,4 correspondingly. Joining of additional reagent molecules to the stoichiometric chelate (1:2 compound) occurs in the second coordination sphere due to the neutral nature of chelate. Thus, compounds with stoichiometric coefficients for the reagent more than 2 are molecular chelates (addition compounds).