Halkalı Alkil Tiyofen-Schiff Bazlarının Protonlanma ve Bunların Ni(II) İyonu ile Kompleks Oluşum Sabitlerinin Belirlenmesi

Abstract

Özet: Halkalı alkil tiyofen-Schiff bazların protonlanma ve bunların Ni(II) iyonu ile olan komplekslerinin kararlılık sabitleri %50 etil alkol-su (v/v) ortamında, potansiyometrik titrasyon yöntemi ile tayin edildi. Titrasyonlar 25°C'de, azot atmosferinde ve 0,15 M KCl'lü ortamda yapıldı. Potansiyometrik titrasyon verilerinden yararlanarak PKAS programı ile Schiff bazlarının stokiyometrik protonlanma sabitleri hesaplandı. Schiff bazlarına ait protonlanma sabitlerinin, kompleksleşme ve antimikrobiyel etkilerine bağlı olup olmadığı araştırıldı.

Keywords

• Schiff bazı,Halkalı alkil,Kompleks oluşum sabitleri,Protonlanma sabitleri,Tiyofen

Determination of the Protonation Constants of Cycloalkyl Thiophen-Schiff Bases and their Complex Stability Constant with Ni(II) Ion

Abstract

Abstract: The protonation constants of the cycloalkyl thiophen-Schiff bases and their stability constants of the Ni(II) complexes were potentiometrically determined in a ethanol–water 50% (w/w) solution at 25°C, under N2 atmosphere and 0.15 M KCl ionic strength. The stoichiometric protonation constants have been measured by the potentiometric titration and calculations were performed by the PKAS computer software recently developed. Variations of the protonation constant of Schiff bases have been discussed in view of structural effects exerted on Ni(II)-complex and antimicrobiyal.

Keywords

• Schiff bases,Cycloring,Complex stability constant,Protonation constants,Thiophen

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