Structures of (pyrazinecarbonyl)hydrazones of substituted benzaldehydes: supramolecular arrangements generated by various intermolecular contacts
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R. Alan Howie
Abstract
The crystal structures of seven (pyrazinecarbonyl)hydrazone mono-substituted benzaldehyde derivatives, N2C4H3CONHN=CHC6H4X (1: X = CN, OMe, OEt or NO2) are reported. In all cases extensive intermolecular C–H · · · X (X = O, N or π-ring) hydrogen-bonding is present in which the nitrogen atom of p-CN and one oxygen atom of o-NO2 substitutents act as hydrogen-bond acceptors and C–H bonds of the methyl groups of the p-OME and m-OEt substituents act as hydrogen-bond donors. While the m-OMe substituted compound exhibits only one-dimensional connectivity in the form of face to face ribbons of molecules two-dimensional layer connectivity is observed in all other cases. If, however, π · · · π interactions and, in the case of (1: X = m-OEt) C–H · · · N and C–H · · · π-ring contacts, which arise between the layers as they are stacked, are taken into account three-dimensional connectivity is the norm for the layer structures except for that of (1: X = o-Et).
© by Oldenbourg Wissenschaftsverlag, München, Germany
Artikel in diesem Heft
- Zeitschrift für Kristallographie - Crystalline Materials
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- Structures of (pyrazinecarbonyl)hydrazones of substituted benzaldehydes: supramolecular arrangements generated by various intermolecular contacts
- Two polymorphs of bis(4-benzoylthio-1,3-dithiole-2-thione)-5,5′-disulphide
- Synthesis, spectral, thermal and structural characterization of hexa-aqua copper(II)] 3-(4-nitrophenyl)-2-phenylpropenoate
- [Tb(pyrazinecarboxylic acid)3(H2O)2] · 6n H2O: Synthesis, structure and photoluminescence
Artikel in diesem Heft
- Zeitschrift für Kristallographie - Crystalline Materials
- Structural investigation of composite phases Ba1 + x [(NaxMn1 – x)O3] with x approx. 2/7, 5/17 and 1/3; exotic Mn4.5+ valence
- Crystal structures of 4-PhCOS-5-RS-1,2-dithiole-3-thione (R = Me and PhCH2), 4,5-(MeS)2-1,2-dithiole-3-thione and 3,4,5-(MeS)3-1,2-dithiolium iodide
- Structures of (pyrazinecarbonyl)hydrazones of substituted benzaldehydes: supramolecular arrangements generated by various intermolecular contacts
- Two polymorphs of bis(4-benzoylthio-1,3-dithiole-2-thione)-5,5′-disulphide
- Synthesis, spectral, thermal and structural characterization of hexa-aqua copper(II)] 3-(4-nitrophenyl)-2-phenylpropenoate
- [Tb(pyrazinecarboxylic acid)3(H2O)2] · 6n H2O: Synthesis, structure and photoluminescence
