eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 December 2007 3 2 149 152 juc 654 article S.G. Shankarwar 1 S.R. Bembalkar 1 T.K. Chondhekar 1 Department of Chemistry Dr. Babasaheb Ambedkar Marathwada University, Aurangabad - 431 004 (INDIA) <p>The present work is undertaken to make a systematic solution study of the complex formation of lanthanide (III) ions with the Schiff bases synthesized from salicylhydrazide with 1) 4- methoxy benzaldehyde 2) 3,4,5 trimethoxy benzaldehyde.&nbsp;</p> <p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The interaction between Schiff bases and lanthanide ions like La (III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III), Dy(III) and Ho(III) has shown 1:1 and 1:2 complex&nbsp; formation and the trend in logk values shown a break at gadolinium. The complex formation has been determined at 30&deg;&plusmn;0.1&deg;C potentiometrically in 40% (v/v) Tetrahydrofuran water mixture and 0.1M (NaClO₄) ionic strength.</p> <p>&nbsp;</p> https://journalofchemistry.org/paper/654/ potentiometrically Schiff bases Tetrahydrofuran water mixture