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
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CHUMAKOV, Yurii; GRAUR, Vasilii О.; TSAPKOV, Victor I.; GULEA, 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. Editia 6, 11-14 septembrie 2012, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2012, p. 88. ISBN 978-9975-66-290-1.
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Materials Science and Condensed Matter Physics
Editia 6, 2012
Conferința "Materials Science and Condensed Matter Physics"
Chișinău, Moldova, 11-14 septembrie 2012

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


Pag. 88-88

Chumakov Yurii1, Graur Vasilii О.2, Tsapkov Victor I.2, Gulea Aurelian2
 
1 Institute of Applied Physics,
2 State University of Moldova
 
Disponibil în IBN: 12 martie 2020


Rezumat

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