Search

In the title benzoylhydrazide derivative, C15H14N2O2, the dihedral angle between the planes of the two phenyl rings is 12.56 (9)°. The azomethine double bond adopts an E configuration stabilized by an N—H...O hydrogen bond. In the crystal, the components are linked by C—H...O interactions to form chains along the b axis.

The title compound, C12H8ClFN2OS, is a hydrazide derivative adopting an E conformation with an azomethine N=C double bond length of 1.272 (2) Å. The molecular skeleton is approximately planar; the terminal five- and six-membered rings form a dihedral angle of 5.47 (9)°. In the crystal, molecules are linked by N—H...O and C—H...O hydrogen bonds into zigzag chains propagating in [100].

The title phenylhydrazine derivative, C16H16N2O4, has a crystallographically imposed centre of symmetry. Except for the methyl group, all non-H atoms are almost coplanar (r.m.s. deviation = 0.0095 Å). Intramolecular O—H...N hydrogen bonds are observed, generating S(6) graph-set ring motifs.

In the title compound, C16H16N2O3·H2O, the dihedral angle between the benzene rings is 30.27 (7)°. In the crystal, the components are linked by N—H...O, O—H...O and C—H...O interactions into a three-dimensional network.

In the title benzoylhydrazide derivative, C17H18N2O, the dihedral angle between the benzene rings is 88.45 (8)° and the azomethine double bond adopts an E conformation. In the crystal, molecules are linked by N—H...O and C—H...O hydrogen bonds, forming a chain along the b axis.

In the title compound, C29H21O3P, a coumarin-substitued ylid, the P atom is linked to three benzene rings and a planar coumarin moiety via a methylenecarbonyl group. The bond lengths in the P=C–C=O fragment clearly indicate a delocalized system involving the olefinic and carbonyl bonds. The molecular structure is stabilized by an intramolecular C—H...O interaction that results in an S7 graph-set ring motif. In the crystal, molecules are linked into a three-dimensional framework by C—H...O hydrogen bonds.

In the title hydrazone derivative, C15H14N2O5, the benzene rings are twisted by 7.55 (8)° with respect to each other. The azomethine double bond adopts an E conformation. The molecular structure is stabilized by intramolecular O—H...N and N—H...O hydrogen bonds, generating S6 ring motifs. In the crystal, molecules are linked into a three-dimensional network by O—H...O hydrogen bonds.

In the title hydrazone derivative, C15H13ClN2O2, the dihedral angle between the benzene rings is 2.36 (2)°. An intramolecular N—H...O hydrogen bond is present. In the crystal, N—H...O and C—H...O hydrogen bonds link the molecules into chains running parallel to the b axis.

The title compound, C15H14N2O4 adopts an E conformation about the azomethine double bond. Intramolecular N—H...O and O—H...N hydrogen bonds generate S(6) rings and help to establish the molecular conformation. The dihedral angle between the benzene rings is 17.84 (10)°. In the crystal, molecules are linked by O—H...O and C—H...O hydrogen bonds into a two-dimensional network with a herring-bone pattern arranged parallel to the bc plane.

The molecule of the title compound, C16H16N2O4, adopts an E conformation about the azomethine C=N double bond. The dihedral angle formed by the benzene rings is 18.88 (9)°. The molecular conformation is stabilized by an intramolecular O—H...N hydrogen bond, which forms an S(6) ring. In the crystal, the molecules are linked into chains parallel to [001] by N—H...O hydrogen bonds. The chains are further connected into a three-dimensional network by π–π stacking interactions with centroid–centroid distances of 3.6538 (10) and 3.8995 (11) Å.

The title compound, C15H14N2O5·CH3OH, displays an E conformation about the azomethine double bond [C=N = 1.277 (2) Å] and the benzene rings are inclined to one another by 18.28 (9)°. An intramolecular O—H...O hydrogen bond occurs between the para-OH group and one of the meta-O atoms of the 3,4,5-trihydroxybenzylidene group. In the crystal, the components are linked into a three dimensional network by O—H...O, O—H...N and C—H...O hydrogen bonds.

In the title compound, C14H13N3O2·H2O, the azomethine double bond adopts an E conformation and the N—N=C—C torsion angle is 178.37 (19)°. The dihedral angle between the benzene and pyridine rings is 5.58 (12)° and the C atom of the methoxy group is roughly coplanar with its attached ring [deviation = 0.157 (3) Å]. In the crystal, the components are linked by O—H...O, O—H...N, N—H...O and C—H...O hydrogen bonds, forming (001) sheets. The water O atom accepts one N—H...O and two C—H...O interactions from the adjacent organic molecule.

In the title compound, C19H20N2O6, the azomethine [C=N = 1.269 (2) Å] double bond adopts an E conformation and the dihedral angle between the planes of the benzene rings is 17.41 (11)°. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R22(16) loops. The dimers are connected by C—H...O and C—H...N hydrogen bonds, forming sheets lying parallel to (100).

In the title compound, C17H18N2O4, the azomethine double bond adopts an E conformation with an N—N—C—C torsion angle of −178.3 (3)°. The benzene rings are almost coplaner, with a dihedral angle of 2.98 (14)° between their mean planes. In the crystal, the molecules are linked by N—H...O hydrogen bonds, resulting in chains of molecules lying parallel to the b axis. The structure is further consolidated by rather weak C—H...O hydrogen-bonding interactions, resulting in six-membered rings about inversion centers linked into chains arranged parallel to the b axis.