Acid Dissociation Constants of Some Novel Isatin Thiosemicarbazone Derivatives


Ozkutuk M., ÖĞRETİR C., ARSLAN T., Kandemirli F., Koksoy B.

JOURNAL OF CHEMICAL AND ENGINEERING DATA, cilt.55, ss.2714-2718, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 55 Konu: 8
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1021/je9009738
  • Dergi Adı: JOURNAL OF CHEMICAL AND ENGINEERING DATA
  • Sayfa Sayıları: ss.2714-2718

Özet

The acid dissociation constants (pK(a)) of five novel biologically active isatin thiosemicarbazone derivatives were determined by a UV-visible spectrophotometric technique at (25 +/- 0.1) degrees C. The deprotonations for all studied molecules were found to occur at the substituted fa-amino group, whereas the protonation seems to take place at the oxo group of the five-membered ring.