Studies on Bis N-Phenylhydroxamic Acids as Metal Complexing Ligands. Part VI. Determination of Formation Constants of AI (lll) Chelates

Inorganic Chemistry Laboratory, University College of Science, Calcutta-9. Manuscript received 25 February 1974 ; revised 1st October 1974 ; accepted 1 October 1974 The formation of aluminium complexes ( Al2R(RH)2(OH)2] of succinyl-, glutaryl-, adipyl-, and pimelyl-\(bis\)-N-phenylhydroxamie acids (Rs H2, Rg H2, Ra H2, Rp H2 respectively ) have been studied potentiometrically in 1 : 2 aqueous ethanol at constant ionic strength (µ-0.25). The step-stability constants of Al (III) chelates are, in general, in the ligand order Rp H\(_2^-\)>Ra H2>R2 H2>Rs H2