Synthesis and characterisation of lanthanon (III) chelates of O-(N-α-oxindolimino) benzoic acid and O-(N-α-oxindolimino) propanoic acid possessing N-N-O moiety

LATA JAIN, SURESH JANGID, HANWANT SINGH, R K MEHTA

Abstract


SchIff bases derived from the condensation of oxindole with antbranillic acid and β-alanine and their lanthanon (III) chelates have been synthesized and characterized by physicochemical techniques, Potentiometric studies have been carried out by Irving-Rossotti method in 30% (v/v) dioxane-water media (fL = O'OlM, and 0'05M, and 0'10M NaCI04) at 25, 35 and 45"C. L\.Go, .aH" and as" of the metal chelates have also been evaluated,

Keywords


O-(N-α-oxindohmino) benzoic acid and O-(N-α-oxindolimino) propanoic acid chelates; stability constants; dissociation constants.

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