-
[show abstract]
[hide abstract]
ABSTRACT: The title compound, C20H20N2O4, crystallizes with four independent molecules in the asymmetric unit. In the molecules, the dihedral angles between the benzene rings and indole mean planes are 24.5 (1), 22.5 (1), 8.8 (1) and 13.9 (1)°. In the crystal, intermolecular N—H...O hydrogen bonds are present between the imino groups and the adjacent carbonyl groups. π–π stacking is also observed with a centroid–centroid distance between nearly parallel pyrrole rings of 3.745 (3) Å.
Acta Crystallographica Section E. 01/2011;
-
[show abstract]
[hide abstract]
ABSTRACT: The title complex, [Fe(C5H5)(C13H11N2O3)], was prepared via self-assembly using ferrocenyl hydrazide and ethyl salicylate. The compound is potentially a tridentate ferrocene-based ligand. The conformation of the molecule allows the formation of an intramolecular N—H...O hydrogen bond involving the hydroxyl group. The CONHNHCO unit and the rings bonded to it are nearly coplanar. The crystal structure is stabilized by intermolecular O—H...O(carbonyl) and N—H...O(carbonyl) hydrogen bonds.
Acta Crystallographica Section E. 01/2008;
-
[show abstract]
[hide abstract]
ABSTRACT: The title compound, C8H11N5S, has been prepared by the reaction of 2-acetylpyrazine with 4-methyl-3-thiosemicarbazide. It exists in the thione form and adopts the E configuration. The molecules are connected by the intermolecular N—H...N and N—H...S interactions.
Acta Crystallographica Section E. 01/2008;