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 SM ISO690:2012CHUMAKOV, Yurii, GRAUR, Vasilii О., TSAPKOV, Victor I., GULYA, Aurelian. MSP 12 P Crystal structures of 6-{[(2,3-dihydroxypropyl)amino]-methylidene}cyclohexa-2,4-dien-1-one and 6-{[(2,3-dihydroxypropyl)-amino]methylidene}-4-nitrocyclohexa-2,4-dien-1-one. In: Materials Science and Condensed Matter Physics, Ed. 6, 11-14 septembrie 2012, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2012, Editia 6, p. 88. ISBN 978-9975-66-290-1. |
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| Materials Science and Condensed Matter Physics Editia 6, 2012 |
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Conferința "Materials Science and Condensed Matter Physics" 6, Chișinău, Moldova, 11-14 septembrie 2012 | ||||||
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It is known that salicylic aldehyde reacts with alcanolamines forming the biologically active Schiff's bases which exist in different tautomeric forms in solution and solid-state. It was found that change of the nature of solvent and insertion of substituents in a benzene ring leads to shifting of this equilibrium in one or another direction. In many cases the biological activity of the above-stated substances will be well-coordinated with their composition and structure. However, the study of structural features of given class of compounds was devoted to condensation products on the basis of mono- or three-atomic amino alcohols. Therefore our investigation was focused on the study of Schiff bases structures obtained from such diatomic amino alcohol as 3-aminopropane-1,2-diol. In this connection we report the results of X-ray diffraction analysis of 6-{[(2,3-dihydroxypropyl)amino]methylidene}cyclohexa-2,4-dien-1-one (I) and 6-{[(2,3-dihydroxypropyl)amino]methylidene}-4-nitrocyclohexa-2,4-dien-1-one (II). These compounds were synthesized on the base of condensation reaction of 3-aminopropane-1,2-diol with 2-hydroxybenzaldehyde and 2hydroxy-5-nitrobenzaldehyde. In the crystal I and II form the two-dimensional hydrogen bond networks which govern the crystal structure organization. The insertion of NO2-group in the phenol cycle has led to joining of 2D-sheets into the layers by O-Н...O bonds.figureThe crystal packing of IfigureThe crystal packing of II. The 2D-sheets are further interlinked by O-Н...O bonds |
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