TY  - JOUR
T1  - Potentiometric Study of the Complexing Ability of 2-Mono(Dihydroxyphosphonyl) Methyl 4-Nitro 6-Methyl Phenol (P2N4M6) and of 2-Mono(Dihydroxyphosphonyl) Methyl 4, 6-Dinitrophenol (P2N46) with Metal Cations Al(III), Cr(III) and Fe(III)
AU - , Fadila Djabi AU - , Fatiha Benghanem 
JO  - Journal of Engineering and Applied Sciences
VL  - 2
IS  - 5
SP  - 828
EP  - 832
PY  - 2007
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2007.828.832
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2007.828.832
KW  - Dihydroxyphosphonyl phenols
KW  -P2N4M6
KW  -P2N4.6
KW  -potentiometry
KW  -stability constants
KW  - complexing ability
AB  - The interaction of ligands 2-mono(dihydroxyphosphonyl) methyl 4-nitro 6-methyl phenol (P2N4M6) and of 2-mono(dihydroxyphosphonyl) methyl 4,6-dinitrophenol (P2N4.6) with  3  metal  ions,   Al(III)   Cr(III) and Fe(III) was studied . By means of potentiometry, the stability constants of the complexes formed were calculated at 25.0 ± 0.1°C. The ionic strength was maintained at 0.1 M with an aqueous solution of NaClO<SUB>4</SUB>. Complexes of 1:1 metal to ligand ratio are formed and the logarithmic values of the stability constants of the model ML are: For P2N4M6: Al(III) = 7.99; Cr(III) = 6.30; Fe(III) = 6.70. For P2N4.6: Al(III) = 6.72; Cr(III) = 7.45; Fe(III) = 6.19. The stability of the 2 ligands is compared and a further comparison of the complexing ability with other ligands is attempted.
ER  -