Stability of Metal Chelates of Some Hydroxamic Acid Ligands

Turkel N.

JOURNAL OF CHEMICAL AND ENGINEERING DATA, cilt.56, sa.5, ss.2337-2342, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 56 Sayı: 5
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1021/je1013119
  • Dergi Adı: JOURNAL OF CHEMICAL AND ENGINEERING DATA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2337-2342
  • Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

The binary ligand complexes formed between acetohydroxamic acid (Aha) and benzohydroxamic acid (Bha) ligands and selected transition metals (Sc(III), Y(III), and La(III)) were investigated potentiometrically in aqueous solution at (25 +/- 0.1) degrees C and I = 0.10 M NaCl to determine the protonation constants of the free ligands and stability constants of the binary complexes. The complexation model for each metal-ligand system was established from the potentiometric data using the software program BEST. The concentration distributions of the various metal-ligand complexes formed in solution were also evaluated. The complex stability was found to follow the trend Sc(III) > Y(III) > La(III) based on the ionic radius of the metal ions.