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Ditopic complex formation of the crown-containing 2-styrylbenzothiazole

New Journal of Chemistry Pub Date: 2002-11-20 DOI: 10.1039/B205305E

Abstract

The complex formation of 2-styrylbenzothiazole containing a 15-crown-5 ether fragment with alkaline earth metal cations, proton, Ag⁺ and Hg²⁺ was studied by optical and X-ray diffraction methods. The compound is able to bind the metal cations through the participation of two centers: the crown ether moiety and the heterocyclic part. The alkaline earth metal cations form complexes with the macrocyclic part of the molecule. The formation of a strong sandwich complex was found in the case of Ba²⁺. The proton coordinates with the N atom of the heterocyclic fragment of the molecule. The Ag⁺ and Hg²⁺ cations bind with both centers of the molecule: the crown ether fragment and the heterocyclic residue.

Graphical abstract: Ditopic complex formation of the crown-containing 2-styrylbenzothiazole

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