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Journals / Gazi University Journal of Science / 2026 / Volume: 27 Issue: 2

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

Gülşen Türkoğlu
Halil Berber
Müjgan Özkütük
Pages
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Publication Date
2014-06-27
DOI
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Objective & Hypothesis:800x600 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.
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Key Findings & Data:The first and the second protonated acidity constants ( p K a1 and p K a2 ) have been found to cause the protonation of the imine nitrogen atom for all molecules.
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🔬Design:Article
📍Scope:Comprehensive Sample
⚙️Variables:Spectrophotometric determination · Symmetric Schiff base · Acidity Dissociation Constants

Abstract

800x600 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 ( p K a ) have been found to be associated with the deprotonation of phenolate oxygen. The first and the second protonated acidity constants ( p K a1 and p K a2 ) have been found to cause the protonation of the imine nitrogen atom for all molecules. The deprotonated acidity constants ( p K a ) 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 ( pK a1 ) 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 ( pK a2 ) 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). Normal 0 21 false false false TR X-NONE X-NONE MicrosoftInternetExplorer4

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Cite This Article

Türkoğlu, G., Berber, H., Özkütük, M. (2014). Spectrophotometric determination of the acidity dissociation constants of symmetric Schiff base derivatives. Gazi University Journal of Science, Volume: 27 Issue: 2. https://ajindex.com/articles/1269674

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