Potentiometric determination of stability constants of Lanthanon(III) complexes with some Schiff bases and benzothiazolines


Gurkan P., Sari N.

TALANTA, cilt.44, ss.1935-1940, 1997 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 44 Konu: 11
  • Basım Tarihi: 1997
  • Doi Numarası: 10.1016/s0039-9140(96)02058-9
  • Dergi Adı: TALANTA
  • Sayfa Sayıları: ss.1935-1940

Özet

The protonation constants of five Schiff base and two benzothiazoline type ligands and stability constants of their complexes with six lanthanide ions were determined by potentiometrically in ethanol-water solution (1:1, v/v) at 25 +/- 0.1 degrees C. The Schiff base-type ligands were salicylidene 2-iminopyridine (SAPy), salicylidene-5-methyl-2-iminopyridine (SAPyMe), salicylidene-5-chloro-2-iminopyridine (SAPyCl), 2-(2-pyridylmethyleneamino) phenol (PyOH), 2-(2-quinolylmethyleneamino) phenol (QuOH) and the benzothiazoline-type ligands were pyridine-2-carbozaldehydebenzothiazoline (PyS) and quinoline-2-carboxaldehydebenzothiazoline (QuS). The order of stability constants was found to be for metal ions La(III)