Protonation constants of some substituted salicylideneanilines in ethanol-water mixtures

Koseoglu F., Kılıc E., Canel E., Yılmaz N.

Analytica Chimica Acta, cilt.293, sa.1-2, ss.87-94, 1994 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 293 Sayı: 1-2
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1016/0003-2670(94)00077-8
  • Dergi Adı: Analytica Chimica Acta
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.87-94
  • Anahtar Kelimeler: POTENTIOMETRY, TITRIMETRY, ETHANOL-WATER MIXTURES, PROTONATION CONSTANTS, SCHIFF BASES, SUBSTITUENT EFFECT, DISSOCIATION-CONSTANTS, ACIDS
  • Ankara Üniversitesi Adresli: Evet

Özet

Protonation constants of some substituted salicylideneanilines have been determined in ethanol-water mixtures at ionic strength of 0.1 M and at 25°C. A potentiometric method was used and calculation was done by Martell's and Motekaitis' PKAS computer programme. The trend in the values of protonation constants of Schiff's bases were explained in terms of the nature of the substituent and the dielectric constant of medium. The applicability of the Hammett equation to the effect of substituents in Schiff's bases is discussed. © 1994.