Preparation of Double Armed Iodo Pyridine Substituted Benzo-15-crown-5 Ligand and Complexes, Investigation of Spectroscopic and Thermal Properties

Abstract

In this study, a new double-armed crown ether ligand (L) was synthesized by interacting 4',5'-bis(bromomethyl)benzo-15-crown-5 and 2-iodo-3-hydroxypyridine. Synthesized ligand (L) was reacted with sodium picrate and potassium picrate to obtain a Na+ and K+ complex. In this way, a 1:1 (filling) complex (NaL) with Na+ conforming to the cavity size of benzo-15-crown-5 and a 1:2 (sandwich) complex (KL2) with K+ larger than the cavity size were obtained. In addition, transition metal complex (AgL) was synthesized from the reaction of compound L with silver nitrate. The structure of the obtained ligands and complexes were characterized using spectroscopic methods (FTIR, HRMS, 1H-NMR, 13C-NMR). Finally, the thermal properties of the synthesized ligand and complexes were investigated using TGA - DTA methods and the results were observed compatible with the structures of the compounds.

Keywords

• Crown ether compounds
• Spectroscopy
• Thermal analysis

İyodo Piridin Sübstitüe Çift Kollu Benzo-15-crown-5 Bileşiği ve Komplekslerinin Eldesi, Spektroskopik ve Termal Özelliklerinin İncelenmesi

Abstract

Bu çalışmada 4′,5′-bis(bromometil)benzo-15-crown-5 ile 2-iyodo-3-hidroksipiridin etkileştirilerek, yeni, çift kollu taç eter ligandı (L) sentezlenmiştir. Sentezlenen ligand (L), Na+ ve K+ kompleksi elde etmek üzere sodyum pikrat ve potasyum pikrat ile tepkimeye sokulmuştur. Böylelikle, benzo-15-crown-5’in halka boşluğuna uygun olan Na+ ile 1:1 (filling) kompleksi (NaL) ve halka boşluğundan daha büyük olan K+ ile 1:2 (sandviç) kompleksi (KL2) elde edilmiştir. Ayrıca bileşik L’nin gümüş nitrat ile reaksiyonu sonucunda geçiş metal kompleksi (AgL) sentezlenmiştir. Elde edilen ligand ve komplekslerin yapısı, spektroskopik yöntemler (FTIR, HRMS, 1H-NMR, 13C-NMR) kullanılarak aydınlatılmıştır. Son olarak, sentezlenen ligand ve komplekslerin termal özellikleri TGA - DTA yöntemleri kullanılarak incelenmiş ve bileşik yapıları ile uyumlu sonuçlar elde edilmiştir.

Keywords

• Taç eter bileşikleri
• Spektroskopi
• Termal analiz

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