Dergiler / Gazi Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2001 / Cilt: 14 - Sayı: 3
Synthesis and characterization of some novel bis ( crown ether ) ligands of Schiff base type
- Sayfa
- 869–876
- DOI
- —
Özet
Yeni crown eter (bis-imine) ligandlan sentezlenmiş ve bunların yapıları element analizi, İR,, 'H-, 13C-NMR ve UV-visible teknikleri ile incelenmiştir. 2-hidroksi Schiff bazı 7 nin değişik çözücülerde, asidik ve bazik ortamlarda UV spektrumları almdı. Fenol-imin —* keto-amin (O-H...N —^* O....H-N ) tautomerisinin asidik ortamda olduğu, 'H-NIVIR ve UV datalanndan polar, nonpolar çözücü ve bazik ortamda mevcut olmadığı gözlendi.
Abstract
Novel bis (crown ether) ligands of Schiff base type were synthesized and their structures were studied by elemental analysis, ER, H-, 13C-NMR and UV-visible techniques. The UV-visible spectra of 2-hydroxy Schiff base 7 were studied in different solvents, acidic and basic media. Compound 7 is in tautomeric equilibria (phenol-imine, O-H...N —*■ keto-amine, 0....H-N forms) in acidic media. These tautomers were not observed in polar , tionpolar solvents and basic media for 7 as supported by 'H-NMR and UV-visible data.