Supramolecular Structure of an Unsymmetrical Pyrazine-modulated Tetrapyridyltriamide and Its Complexes
Resource
JOURNAL OF THE CHINESE CHEMICAL SOCIETY, 57, 765-770
Journal
Journal of the Chinese Chemical Society
Pages
765-770
Date Issued
2010
Date
2010
Author(s)
Abstract
An unsymmetrical pyrazine-modulated oligo-α-pyridylamine ligand as N2-(pyrazin-2-yl)-N6-(6- (pyridin-2-ylamino)pyridin-2-yl) pyridine-2,6-diamine (H3tpz) and its copper(II) and cobalt(II) complexes have been synthesized and structurally characterized. The free ligand H3tpz (1) exhibits a syn-anti-syn-anti-syn-anti conformation, and shows a double chain supramolecular structure through hydrogen bonds and π-π interactions. H3tpz is a quadridentate ligand in both copper and cobalt mononuclear complexes and coordinates to metal atoms in an all-anti mode. The copper(II) ion in [Cu(H3tpz)(ClO4)]- ClO4 (2) is five-coordinated in tetragonal pyramid geometry with one of the perchlorate anions being weakly coordinated at the apex position. The cobalt(II) ion in [Co(H3tpz)(CH3OH)2](ClO 4)2 (3) is six-coordinated in octahedron geometry. Extensive hydrogen bonds are formed, and construct the complexes 2 and 3 into 1D supramolecular structure.
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Type
journal article
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