Helical zinc complexes of pyrazine–pyridine hybrids

Dias, S. I. G.; Heirtzler, Fenton; Bark, Thomas; Labat, Gael; Neels, Antonia

doi:10.1016/j.poly.2003.12.013

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Journal article

Helical zinc complexes of pyrazine–pyridine hybrids

Dias, S. I. G. School of Physical Sciences, Chemical Laboratory, University of Kent, Canterbury, UK
Heirtzler, Fenton School of Physical Sciences, Chemical Laboratory, University of Kent, Canterbury, UK
Bark, Thomas Department of Chemistry, University of Fribourg, Switzerland
Labat, Gael Institute of Chemistry, University of Neuchâtel, Switzerland
Neels, Antonia Institute of Chemistry, University of Neuchâtel, Switzerland

21.02.2004

Published in:

Polyhedron. - 2004, vol. 23, no. 6, p. 1011-1017

English The zinc(II) complexes 1aZnCl₂ and 1bZnCl₂ (1a: 2-(6',2''-bipyrid-2'-yl)-3-(2- pyridyl)pyrazine; 1b: 2-(6',2'-bipyrid-2'-yl)-5,6-dinitrilo-3-(2-pyridyl)pyrazine) were prepared by treatment of the ligands with ZnCl₂. The structures of both were investigated by X-ray crystallography and 1H NMR spectroscopy. Both complexes display proton deshielding phenomena that are attributed to a twisted solution-state molecular conformation. In the solid state, 1aZnCl₂ exhibits a high degree of torsion about the axis through the uncomplexed pyridine ring and the pendant chlorine atoms. The solid-state structure and solution-state self-associative behavior of 1bZnCl₂ are indicative of a partial self-assembly motif.

Faculty

Faculté des sciences et de médecine

Department

Département de Chimie

Language