Formation constants of chromium(III), scandium(III) and yttrium(III) complexes of some hydroxy naphthoic acids

Aksoy M. S., Aydin R., Turkel N., Ozer U.

CHEMICAL & PHARMACEUTICAL BULLETIN, cilt.53, sa.5, ss.471-475, 2005 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 53 Sayı: 5
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1248/cpb.53.471
  • Dergi Adı: CHEMICAL & PHARMACEUTICAL BULLETIN
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.471-475
  • Anahtar Kelimeler: chromium scandium, yttrium, naphthoic acid, formation constant, water pollutant, AQUEOUS-SOLUTION, CARBOXYLIC-ACIDS, SALICYLIC-ACID, HYDROXYAROMATIC LIGANDS, DISSOCIATION-CONSTANTS, DERIVATIVES, STABILITIES, COPPER(II), BERYLLIUM(II), EQUILIBRIUM
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

The complexes of chromium(III), scandium(III) and yttrium(Ill) formed by 1-hydroxy-2-naphthoic acid (1,2-HNA: H2L) and 3-hydroxy-2-naphthoic acid (3,2-HNA: H2L) were investigated by potentiometry and spectroscopy at 25 +/- 0.1 degrees C and at an ionic strength of 0.1 m KNO3 in 50% ethanol-water (v/v) medium. The stoichiometries of these three M(III) complexes formed with these hydroxy-naphthoic acids and with hydroxo ion were defined and their formation constants were determined and compared. Thus, the removing capacities of these ligands could be examined by calculating the equilibrium concentration of Cr(III) that exists in the discharge water of various industries since Cr(III) ions are the main pollutants present during waste water treatment in our city, Bursa.