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The title compound, C14H13N3O3·H2O, adopts an E conformation with respect to the azomethine bond and crystallizes in the amide form. An intramolecular O—H
N hydrogen bond occurs. In the crystal, the lattice water molecule plays a major role in the supramolecular architecture by interconnecting adjacent molecules into a three-dimensional netwrok by means of O—HO, O—HN and N—HO hydrogen-bonding interactions. The structure also features two non-classical C—HO interactions.
N hydrogen bond occurs. In the crystal, the lattice water molecule plays a major role in the supramolecular architecture by interconnecting adjacent molecules into a three-dimensional netwrok by means of O—HO, O—HN and N—HO hydrogen-bonding interactions. The structure also features two non-classical C—HO interactions.organic compoundsOpen access
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In the title compound, C12H11N3O3·2H2O, the dihedral angle formed by the planes of the pyridine and the furan rings of the organic carbohydrazide molecule is 4.66 (7)°. In the crystal, these molecules form stacks along the b-axis direction, neighbouring molecules within each stack being related by inversion and the shortest distance between the centroids of the pyridine and furan rings being 3.714 (1) Å. Molecules from neighboring stacks are linked by pairs of N—HO hydrogen bonds. The water molecules fill the channels between the stacks being linked by O—HO hydrogen bonds into helices along [010]. Besides this, water molecules are involved in O—HN and O—HO hydrogen bonds with the carbohydrazide molecules, thus forming a three-dimensional network, augmented by weak C—HO interactions.
O hydrogen bonds. The water molecules fill the channels between the stacks being linked by O—HO hydrogen bonds into helices along [010]. Besides this, water molecules are involved in O—HN and O—HO hydrogen bonds with the carbohydrazide molecules, thus forming a three-dimensional network, augmented by weak C—HO interactions.organic compoundsOpen access
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The title compound, C15H12N4O, adopts an E conformation with respect to the azomethine bond and crystallizes in its hydrazinylidene tautomeric form. The dihedral angle between the ring systems is 15.98 (7)°. The phenol O—H group forms an intramolecular O—HN hydrogen bond. In the crystal, pairs of N—HN and C—HO hydrogen bonds link neighbouring molecules into centrosymmetric dimers. These dimers are interconnected by means of three types of π–π stacking interactions. One, with a centroid–centroid distance of 3.577 (1) Å [interplanar separation = 3.4673 (6) Å], connects adjacent molecules into centrosymmetric dimers. The other two interactions, on the outward facing sides of the dimers, are between phenol rings of neighboring molecules [centroid–centroid separation = 3.7907 (13) Å and interplanar separation = 3.5071 (8) Å], and between phthalazin units [centroid–centroid separation = 3.6001 (12) Å and interplanar separation = 3.4891 (7) Å]. In combination, the π–π interactions lead to the formation of infinite layers with molecules stacked along [0-11]. These layers are, in turn, connected with neighbouring layers through the N—HN and C—HO hydrogen bonds, yielding a three-dimensional supramolecular architecture.
N hydrogen bond. In the crystal, pairs of N—HN and C—HO hydrogen bonds link neighbouring molecules into centrosymmetric dimers. These dimers are interconnected by means of three types of π–π stacking interactions. One, with a centroid–centroid distance of 3.577 (1) Å [interplanar separation = 3.4673 (6) Å], connects adjacent molecules into centrosymmetric dimers. The other two interactions, on the outward facing sides of the dimers, are between phenol rings of neighboring molecules [centroid–centroid separation = 3.7907 (13) Å and interplanar separation = 3.5071 (8) Å], and between phthalazin units [centroid–centroid separation = 3.6001 (12) Å and interplanar separation = 3.4891 (7) Å]. In combination, the π–π interactions lead to the formation of infinite layers with molecules stacked along [0-11]. These layers are, in turn, connected with neighbouring layers through the N—HN and C—HO hydrogen bonds, yielding a three-dimensional supramolecular architecture.
