A. Trzesowska-Kruszynska
Jun 1, 2011
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Influential Citations
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Journal
Structural Chemistry
Abstract
The crystal and molecular structures of nicotinohydrazide-derived hydrazones, N′-(2-furfurylidene)pyridine-3-carbohydrazide and N′-(1-(2-thienyl)ethylidene)pyridine-3-carbohydrazide, have been determined. The compounds have been also characterized by the solid state IR and UV–Vis spectroscopy. The hydrazones exist in the keto-amine form. According to the results of molecules quantum–mechanical calculations, performed for isolated molecules, this tautomeric form is energetically unfavorable but in the solid and solution states the observed intermolecular interactions support the presence of this form. The furan derivative crystallizes in two polymorphic forms with two molecules in an asymmetric unit regardless of the crystallization method.