In the title compound, C17H11F3O2, the dihydroindene ring is approximately planar with a maximum deviation of 0.024 (2) Å and makes a dihedral angle of 3.17 (8) Å with the adjacent benzene ring. In the crystal, molecules are interconnected by C—H⋯O interactions, forming an infinite chain along the c axis.
In the title compound, C16H11BrO, the dihydroindene ring system is approximately planar, with a maximum deviation of 0.008 (2) Å. The mean plane of this ring system forms a dihedral angle of 3.73 (11)°, with the bromo-substituted benzene ring. In the crystal, weak intermolecular C—H⋯O hydrogen bonds link the molecules into sheets parallel to the ab plane and further stabilization is provided by weak C—H⋯π interactions involving the bromo-substituted benzene rings.
In the title compound, C16H11ClO, the dihedral angle between the almost planar dihydroindene ring system (r.m.s. deviation = 0.009 Å) and the chlorobenzene ring is 3.51 (14)°. In the crystal, molecules are connected by C—H⋯O and weak C—H⋯Cl interactions, forming infinite layers parallel to (101).
The molecular structure of the title compound, C18H16O3, is roughly planar; the maximum deviation of the indanone ring system is 0.027 (1) Å and it makes a dihedral angle of 2.69 (3)° with the phenyl ring. The torsion angles between the two methoxy groups and the indanone ring are −14.67 (11) and −1.11 (12)°. In the crystal, molecules are connected into a ribbon along the a axis via weak intermolecular C—H⋯O hydrogen bonds. Weak intermolecular C—H⋯π and π–π [centroid–centroid distance = 3.7086 (6) Å] interactions are also observed.
The title compound, C20H19N3O, was obtained by condensation of 2,3-dihydro-1H,9H-pyrrolo[2,1-b]quinazolin-9-one (alkaloid deoxyvasicinone, isolated from Peganum Harmala) with 4-(dimethylamino)benzaldehyde in the presence of sodium methoxide. The 2,3-dihydro-1H,9H-pyrrolo[2,1-b]quinazolin-9-one part of the molecule is roughly planar (r.m.s. deviation = 0.0178 Å) and is essentially coplanar with the benzilidene ring (r.m.s. deviation = 0.0080 Å), forming a dihedral angle of 5.0 (1)°. The crystal structure is stabilized by two aromatic π–π stacking interactions observed between the benzene rings of neighboring molecules [centroid–centroid distance = 3.7555 (19) Å.
In the title compound, C21H21NO, the indene ring system is essentially planar with a maximum deviation of 0.066 (1) Å and makes dihedral angles of 7.93 (6) and 2.43 (6)°, respectively, with the benzene plane and the mean plane of the piperidine ring. These latter two planes make a dihedral angle of 7.61 (7)°. In the crystal, molecules are linked by C—H⋯O interactions, forming infinite chains along the b axis.
The title compound, C20H19N3O2, was obtained by the condensation of 4-(dimethylamino)benzaldehyde with 3-hydroxy-2-naphthohydrazide. The molecule is approximately planar, with an intramolecular N—H⋯O hydrogen bond involving the imino H atom and the hydroxy O atom. The dihedral angle between the benzene ring and the naphthyl mean plane is 2.72 (13)°. In the crystal structure, symmetry-related molecules are linked by intermolecular O—H⋯O hydrogen bonds, forming chains propagating in the c-axis direction.
The molecule of the title Schiff base compound, C18H12Cl2F6N2, adopts an E configuration with respect to the azomethine C=N bond. Intramolecular C—H⋯F (× 2) and C—H⋯Cl (× 2) hydrogen bonds generate S(5) ring motifs. The imino group is coplanar with the aromatic ring. Within the molecule, the planar units are parallel, but extend in opposite directions from the methylene bridge, as indicated by the dihedral angle between the two benzene rings of 3.74 (6)°. The interesting features of the crystal structure are weak intermolecular Cl⋯N and F⋯F interactions, with distances of 2.9192 (11) and 3.2714 (10) Å, respectively, which are shorter than the sum of the van der Waals radii of the relevent atoms. These interactions link neighbouring molecules into dimers which are stacked down the b axis.
In the title compound, C25H27N7O2·H2O, the bis[4-(dimethylamino)benzylidene]pyridine-2,6-dicarbohydrazide molecule and the water molecule are located on a twofold rotation axis. The benzene and pyridine rings form a dihedral angle of 17.13 (7)°. In the crystal, intermolecular N—H⋯O and O—H⋯O hydrogen bonds link the molecules into a two-dimensional supermolecular structure parallel to the ab plane.
In the title compound, C31H22F3NO2, the pyrrolidine and cyclopentane rings within the dihydroindene ring system are in envelope conformations, with the N atom and the spiro-C atom at the flap, respectively. An intramolecular C—H⋯O hydrogen bond forms an S(8) ring motif. The mean plane through the pyrrolidine ring [r.m.s. deviation = 0.179 (2) Å] makes dihedral angles of 86.30 (13), 88.99 (10) and 79.69 (11)° with the benzene ring, the dihydroacenaphthylene ring and the mean plane of the indane system, respectively. In the crystal, molecules are linked by C—H⋯O and C—H⋯N hydrogen bonds into a two-dimensional network parallel to the ac plane. C—H⋯π interactions further stabilize the crystal structure.
In the molecule of the title compound, C16H10BrFO, the indane ring system is planar with a maximum deviation of 0.020 (3) Å. An intramolecular C—H⋯O interaction results in the formation of a planar ring, which is oriented at dihedral angles of 2.24 (3) and 2.34 (3)° with respect to the adjacent rings. π–π contacts between the benzene and indane rings [centroid–centroid distances = 3.699 (1) and 3.786 (1)Å] may stabilize the crystal structure.
In the title compound, [PdBr(C27H23N3OPS)]·C3H6O, the coordination geometry about the PdII atom is distorted square-planar, arising from the attached Br, S, P and N atoms (N and Br are trans), the maximum deviation from the plane being 0.2053 (4) Å for the N atom. The three benzene rings attached to the P atom make dihedral angles of 69.78 (7), 87.05 (7) and 77.50 (7)° with each other. An intramolecular C—H⋯N hydrogen bond forms an S(6) ring motif. In the crystal, the complex molecules form infinite chains along the a-axis direction through C—H⋯Br interactions, and a C—H⋯O interaction links the main molecule with the acetone solvent molecule.
In the title compound, C31H23NO2S, the pyrrolidine ring adopts an envelope conformation (with the spiro C atom as the flap), while the thiazolidine ring and the two cyclopentane rings adopt twisted conformations. The mean plane through the hexahydropyrrolo[1,2-c]thiazole ring [r.m.s deviation = 0.400 (1) Å] forms dihedral angles of 76.83 (4), 80.70 (5) and 79.00 (4)° with the benzene ring and the mean planes of the dihydroacenaphthylene and the dihydroindene rings, respectively. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into sheets lying parallel to the bc plane. One of the ketone O atoms accepts three such bonds. Weak C—H⋯π interactions are also observed.
The title compound, C14H15N3O2, was prepared by the reaction of 4-(dimethylamino)benzaldehyde and furan-2-carbohydrazide. The dihedral angle between the benzene ring and the furan ring is 25.59 (19)°. In the crystal, molecules are linked by intermolecular N—H⋯O hydrogen bonds, forming chains along .
In the title compound, C34H28N2O2S, the piperidine ring adopts a chair conformation. One of the pyrrolidine rings adopts an envelope conformation with the methylene C atom at the flap whereas the other pyrrolidine ring and the thiazolidine ring adopt half-chair conformations. The mean plane of the dihydroacenaphthylene ring system [maximum deviation = 0.067 (1) Å] makes dihedral angles of 28.31 (5) and 31.32 (6)° with the two terminal benzene rings. An intramolecular O—H⋯N hydrogen bond forms an S(5) ring motif. In the crystal, molecules are linked by C—H⋯O and C—H⋯S hydrogen bonds into layers lying parallel to the ac plane.
In the title compound, C14H15N3, the diethylamino N atom, benzene ring, olefinic bond and cyano groups form an extended conjugated system, making the molecule nearly planar: the dihedral angle between the benzene ring and the best plane throught the cyano groups is 4.93 (10)°, while the dihedral angle between the benzene ring and the plane through the diethylamino N atom and the two attached ethyl C atoms is 9.51 (14)°. In the crystal, intermolecular C—H⋯π interactions stabilize the packing.
The molecule of the title compound, C12H11N3O2, is approximately planar with an r.m.s. deviation of 0.0814 Å from the plane through all the non-H atoms. The dihedral angle formed by the benzene and isoxazole rings is 6.88 (16)°. The molecular conformation is stabilized by an intramolecular C—H⋯N hydrogen bond, forming an S(6) ring, and the molecule displays an E configuration with respect to the C=N double bond. In the crystal structure, intermolecular N—H⋯O hydrogen bonds form centrosymmetric dimers which are further linked by weak C—H⋯N interactions augmented by very weak C—H⋯π contacts, forming layers parallel to (120).
In the title compound, C29H20F3NO3S, the thiazolidine ringadopts a half-chair conformation. The pyrrolidine and two five-membered carbocyclic rings are in envelope conformations with the spiro C atoms at the flaps. The trifluoromethyl-substituted benzene ring forms dihedral angles of 62.37 (14) and 87.40 (14)° with the benzene rings of the dihydro-1H-indene units. The two benzene rings form a dihedral angle of 36.94 (15)°. The molecular structure is stabilized by intramolecular C—H⋯O hydrogen bonds, which generate S(6) ring motifs. In the crystal, molecules are linked into inversion dimers by pairs of intermolecular C—H⋯O hydrogen bonds, generating R
2(10) ring motifs.
The molecule of the title compound, C14H13N3O, adopts an E conformation with respect to the azomethine C=N bond, and is roughly planar, with an r.m.s. deviation of the non-H atoms from the least-squares plane of 0.100 (2) Å and a dihedral angle between the terminal benzene rings of 5.74 (12)°. An intramolecular N—H⋯N hydrogen bond closes an S(6) ring. In the crystal, molecules are linked by the pairs of N—H⋯O hydrogen bonds into centrosymmetric dimers. Dimers related by translation along  form slanted stacks, the shortest C⋯C intermolecular distance within the stack being 3.283 (3) Å. Weak C—H⋯π interactions link the stacks into a three-dimensional structure.
In the title molecule, C17H11F3O, the indan ring system and the trifluoromethyl-substituted benzene ring are approximately individually planar and form a dihedral angle of 1.81 (5)° with each other. In the crystal, molecules are linked by pairs of weak bifurcated (C—H)2⋯O hydrogen bonds to form centrosymmetric dimers, generating R
1(6) and R
2(10) ring motifs. These dimers are connected by further weak C—H⋯O hydrogen bonds into one-dimensional chains along the b axis. Weak C—H⋯π interactions are also present.
In the title compound, C18H16O3, the mean plane of the nine-membered indane system makes a dihedral angle of 3.71 (17)° with the benzene ring of the dimethoxyphenyl group. The molecular conformation is stabilized by intramolecular C—H⋯O hydrogen contacts. The crystal structure is stabilized by intermolecular C—H⋯O interactions, which link neighbouring molecules into one-dimensional extended chains along the  direction. In the structure, C—H⋯π interactions are also observed.
In the title compound, C19H18N4O2, the 1,8-naphthyridine ring system is essentially planar [r.m.s. deviation = 0.011 (3) Å]. The dihedral angle between the naphthyridine ring system and the phenyl ring is 28.95 (7)°. The carbohydrazide H atom is involved in an intramolecular N—H⋯O hydrogen bond, forming a six-membered hydrogen-bonded ring. In the crystal, the molecules arrange themselves into centrosymmetric dimers by means of intermolecular C—H⋯O hydrogen bonds.
In the title compound, C38H30N2O2, the acenaphthylene ring is close to being planar [maximum deviation = 0.1047 (11) Å]. The dihedral angles between the three benzene rings and the acenaphthylene system are 39.47 (3), 37.65 (3) and 44.47 (3)°. An intramolecular O—H⋯N interaction forms an S(5) hydrogen-bond ring motif. In the crystal, molecules are linked into  chains by a set of C—H⋯O interactions.
In the asymmetric unit of the title compound, C16H16N4O3·H2O, there are two symmetry-independent hydrazide molecules with almost identical geometries, and two independent water molecules. The dihedral angles between the two benzene rings in the two hydrazide molecules are 0.11 (5) and 0.77 (5)°. In one molecule, an intramolecular C—H⋯O hydrogen bond generates a ring of graph-set motif S(5). Intermolecular N—H⋯O, O—H⋯O, O—H⋯N and C—H⋯O hydrogen bonds and π–π stacking interactions between the benzene rings [centroid–centroid distances in the range 3.5021 (6)–3.6403 (6) Å] are observed, together with O⋯O [2.7226 (11) Å], O⋯N [2.7072 (10) Å] and N⋯O [2.7072 (10)–2.8582 (12) Å] short contacts. The hydrazine molecules are stacked along the b axis and adjacent molecules are linked by water molecules.
In the title compound, C27H20ClNO3, the two cyclopentane rings adopt envelope conformations. The pyrrolidine ring also adopts an envelope conformation (with the spiro C atom as the flap) and its least-squares plane (fitted to five atoms) makes dihedral angles of 66.50 (9), 77.36 (8) and 73.76 (8)° with the chlorobenzene ring and the two 2,3-dihydro-1H-indene ring systems, respectively. The molecular conformation is stabilized by an intramolecular C—H⋯O hydrogen bond, which generates an S(6) ring motif. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into chains running parallel to the  direction.