Now showing items 1-6 of 6
Abstract: | In the title molecule, C16H11N5, the mean planes of the quinoxaline and indazole fragments form a dihedral angle of 10.62 (5). In the crystal, weak intermolecular N—H..........N hydrogen bonds link the molecules into zigzag chains extending in the [001] direction. The crystal packing also exhibits pye interactions [centroid–centroid distances of 3.7080 (2) and 3.8220 (5) A ˚ ], which form stacks of the molecules parallel to the a axis |
URI: | http://dyuthi.cusat.ac.in/purl/1649 |
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leeju.pdf | (199.0Kb) |
Abstract: | In the molecule of the title compound, C20H16N6, the central C—C bond lies on a crystallographic inversion centre. The quinoxalidine ring is nearly planar, with a maximum deviation of 0.021 (2) A ˚ from the mean plane. The crystal structure is stabilized by intermolecular C—H....N interactions, leading to the formation of a layer-like structure, which extends along the a axis |
URI: | http://dyuthi.cusat.ac.in/jspui/handle/dyuthi/1642 |
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Acta E Digna.pdf | (313.7Kb) |
Abstract: | The mononuclear cobalt(II) complex [CoL2] H2O (where HL is quinoxaline-2-carboxalidine- 2-amino-5-methylphenol) has been prepared and characterized by elemental analysis, conductivity measurement, IR, UV-Vis spectroscopy, TG-DTA, and X-ray structure determination. The crystallographic study shows that cobalt(II) is distorted octahedral with each tridentate NNO Schiff base in a cis arrangement. The crystal exhibits a 2-D polymeric structure parallel to [010] plane, formed by O-H...N and O-H... O intermolecular hydrogen bonds and pye stacking interactions, as a racemic mixture of optical enantiomers. The ligand is a Schiff base derived from quinoxaline-2-carboxaldehyde |
URI: | http://dyuthi.cusat.ac.in/jspui/handle/dyuthi/1638 |
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665515_758077589_915864698.pdf | (576.1Kb) |
Abstract: | An efficient one-pot synthesis of two new heterocyclic perimidines 4-(2,3-dihydro-1H-perimidin-2-yl)-2-methoxyphenol and 2-(quinoxalin-2-yl)-2,3-dihydro-1H-perimidine in good yields is presented. This methodology provides a simple, straightforward synthetic route to these interesting classes of heterocycles. Crystal structure, solvatochromism and antibacterial activity of these organic compounds are discussed. |
URI: | http://dyuthi.cusat.ac.in/purl/1640 |
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tet let varsha.pdf | (437.1Kb) |
Abstract: | The Schiff base compounds N,N0-bis[(E)-quinoxalin-2-ylmethylidene] propane-1,3-diamine, C21H18N6, (I), and N,N0-bis[(E)- quinoxalin-2-ylmethylidene]butane-1,4-diamine, C22H20N6, (II), crystallize in the monoclinic crystal system. These molecules have crystallographically imposed symmetry. Compound (I) is located on a crystallographic twofold axis and (II) is located on an inversion centre. The molecular conformations of these crystal structures are stabilized by aromatic pye stacking interactions. |
URI: | http://dyuthi.cusat.ac.in/jspui/handle/dyuthi/1641 |
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Acta Cryst. (2009). C65, o612_o614.pdf | (390.4Kb) |
Abstract: | The asymmetric unit of the title compound, C11H8N4, contains two independent molecules. In the crystal structure, intermolecular N—H.....N hydrogen bonds link molecules into ribbons extended in the [100] direction |
URI: | http://dyuthi.cusat.ac.in/purl/1643 |
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acta e varsha.pdf | (213.4Kb) |
Now showing items 1-6 of 6
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