Protonation constants of some N-substituted thiophene-2-carboxamidoximes

Akay M. A., Durust N., Durust Y., Kilic E.

ANALYTICA CHIMICA ACTA, cilt.392, sa.2-3, ss.343-346, 1999 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 392 Sayı: 2-3
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1016/s0003-2670(99)00220-2
  • Dergi Adı: ANALYTICA CHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.343-346
  • Anahtar Kelimeler: protonation constants, potentiometric titration, thiophene, carboxamidoximes, basicity, ethanol-water mixture, BOND-DISSOCIATION ENERGIES, ACIDITIES, AMIDOXIMES
  • Ankara Üniversitesi Adresli: Evet

Özet

The stoichiometric protonation constants of some N-substituted thiophene-2-carboxamidoximes have been determined in 50% ethanol-water mixture (v/v) at ionic strength of 0.1 M NaClO4 and at 25 degrees C A potentiometric titration method was used and calculation was done by using recently developed software. Variations of the protonation constant of these compounds were discussed in view of structural effects exerted on amino nitrogen and thiophenyl moiety by the substituents. (C) 1999 Elsevier Science B.V. All rights reserved.