Spectrophotometric determination of the acidity dissociation constants of symmetric Schiff base derivatives

Gülşen TÜRKOĞLU; Halil BERBER; Müjgan ÖZKÜTÜK

Makale detayları

Spectrophotometric determination of the acidity dissociation constants of symmetric Schiff base derivatives

Yazarlar:

Gülşen TÜRKOĞLU | Halil BERBER | Müjgan ÖZKÜTÜK

Yayıncı:

Gazi University

Dergi:

Gazi University Journal of Science 2014 Vol.27 Issue 2, pp.771-783

Belge Tipi:

Makale

Yayın Tarihi:

6/2014

Belge Dili:

İngilizce

Document ID (Org No.):

2000429067

eISSN:

2147-1762

Özet:

 

In this study, the acidity constants of series symmetric Schiff base derivatives have been determined using the UV-visible spectrophotometric method at a temperature of 25(±0.1) °C. The deprotonated acidity constants (pKa) have been found to be associated with the deprotonation of phenolate oxygen. The first and the second protonated acidity constants (pKa1 and pKa2) have been found to cause the protonation of the imine nitrogen atom for all molecules. The deprotonated acidity constants (pKa) were found for molecules 5 (9.088), 8 (9.848), 6 (10.243), 2 (10.2569), 3 (10.297), 1 (10.587), 7 (10.692) and 4 (10.804). The first protonation (pKa1) was found for molecules 2 (3.432), 5 (4.207), 8 (4.612), 7 (4.758), 4 (4.995), 1 (5.288), 6 (5.606) and 3 (6.452). The second protonation (pKa2) was found for molecules 2 (-5.384), 8 (-5.165), 5 (-5.028), 7 (-4.775), 4 (-4.518), 1 (-4.111), 6 (-3.866) and 3 (-3.212). .

Makale detayları

Spectrophotometric determination of the acidity dissociation constants of symmetric Schiff base derivatives

Yazarlar: Gülşen TÜRKOĞLU | Halil BERBER | Müjgan ÖZKÜTÜK

Yayıncı: Gazi University

Dergi: Gazi University Journal of Science 2014 Vol.27 Issue 2, pp.771-783

Belge Tipi: Makale

Yayın Tarihi: 6/2014

Belge Dili: İngilizce

Document ID (Org No.): 2000429067

eISSN: 2147-1762

Sayı

Yazarlar:

Gülşen TÜRKOĞLU | Halil BERBER | Müjgan ÖZKÜTÜK

Yayıncı:

Gazi University

Dergi:

Gazi University Journal of Science 2014 Vol.27 Issue 2, pp.771-783

Belge Tipi:

Makale

Yayın Tarihi:

6/2014

Belge Dili:

İngilizce

Document ID (Org No.):

2000429067

eISSN:

2147-1762