Potentiometric investigations of some catechol derivatives of scandium

Turkel N., Ozer U.

RUSSIAN JOURNAL OF COORDINATION CHEMISTRY, cilt.31, sa.3, ss.213-217, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 31 Sayı: 3
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1007/s11173-005-0078-2
  • Dergi Adı: RUSSIAN JOURNAL OF COORDINATION CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.213-217
  • Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

The equilibrium reactions of scandium(III) with some triprotic catechol derivatives (H3L) were studied. The selected ligands that are 2,3-dihydroxybenzoic acid (2,3-DHBA), 3,4-dihydroxybenzoic acid (3,4-DHBA), 3.4-dihydroxyhydrocinnamic acid (3,4-DHHCA), and 3,4-dihydroxyphenylacetic acid (3,4-DHPA) were investigated in aqueous solution by means of potentiometry in 0.1 M ionic medium at 25 degrees C. The stability constants are reported for the ScL and ScL(H2L)(-) mononuclear complexes. 2,3-DHBA can bind to Sc3+ ion strongly and the salicylate mode (COO-, O-) is effective over the acidic pH range. But in higher pH range, 3,4-DHBA, 3,4-DHHCA, and 3,4-DHPA act more efficiently through catecholate groups (O-, O-).