Ísmail Çelik

4-(9-Anthr-yl)-1-(3-bromo-phen-yl)spiro-[azetidine-3,9'-xanthen]-2-one.

In the title molecule, C35H22BrNO2, the four-membered ring of the β-lactam unit is nearly planar [maximum deviation = 0.003 (3) Å] and makes dihedral angles of 87.07 (15), 59.80 (16) and 20.81 (19)°, respectively, with the xanthene system, the anthracene system and the bromo-substituted benzene ring. The molecular conformation is stabilized by weak intramolecular C—H⋯O and C—H⋯N hydrogen bonds. The crystal structure features weak C—H⋯π interactions.

1-Benzyl-3-[(trimethyl­sil­yl)meth­yl]benzimidazolium chloride monohydrate

The title compound, C18H23N2Si+·Cl−·H2O, was synthesized from 1-[(trimethylsilyl)methyl]benzimidazole and benzyl chloride in dimethylformamide. The benzimidazole ring system is approximately planar, with a maximum deviation of 0.022 (2) Å, and makes an angle of 74.80 (12)° with the phenyl ring. The crystal packing is stabilized by O—H⋯Cl, C—H⋯Cl, C—H⋯O and C—H⋯π interactions between symmetry-related molecules together with π–π stacking interactions between the imidazolium and benzene rings [centroid–centroid distance = 3.5690 (15) Å] and between the benzene rings [centroid–centroid distance = 3.7223 (14) Å].

4-(9-Anthr­yl)-1-phenylspiro­[azetidine-3,9′-xanthen]-2-one

The β-lactam ring of the title compound, C35H23NO2, is nearly planar with a maximum deviation of 0.003 (3) Å from the mean plane. It makes dihedral angles of 17.4 (2), 85.22 (17) and 65.39 (16)°, respectively, with the phenyl, xanthene and anthracene ring systems. In the crystal structure, there are intramolecular C—H⋯O and C—H⋯N contacts and molecules are also linked by C—H⋯π interactions.

Crystal structure of 2-[4-(4-chloro­phen­yl)-1-(4-meth­oxy­phen­yl)-2-oxoazetidin-3-yl]benzo[de]iso­quinoline-1,3-dione dimethyl sulfoxide monosolvate

In the title solvated compound, C28H19N2O4·C2H6OS, the central β-lactam ring is almost planar (r.m.s. deviation = 0.002 Å). It makes dihedral angles of 1.92 (11), 83.23 (12) and 74.90 (10)° with the methoxy- and chlorophenyl rings and the ring plane of the 1H-benzo[de]isoquinoline-1,3(2H)-dione group [maximum deviation = 0.089 (1)], respectively. An intramolecular C—H⋯O hydrogen bond closes an S(6) ring and helps to establish the near coplanarity of the β-lactam and methoxybenzene rings. In the crystal, the components are linked by C—H⋯O hydrogen bonds, C—H⋯π interactions and aromatic π–π stacking interactions [centroid-to-centroid distances = 3.6166 (10) and 3.7159 (10) Å], resulting in a three-dimensional network, The dimethyl sulfoxide solvent molecule is disordered over two sets of sites in a 0.847 (2):0.153 (2) ratio.

5-Fluoro-N′-[(E)-4-methoxy­benzyl­idene]-3-phenyl-1H-indole-2-carbohydrazide

In the title molecule, C23H18FN3O2, the mean plane of the indole system forms dihedral angles of 44.23 (8) and 14.54 (7)°, respectively, with the phenyl and benzene rings. In the crystal, intermolecular N—H⋯O hydrogen bonds link molecules into two-layer ribbons extended along the b axis. The crystal packing also exhibits weak intermolecular C—H⋯O, C—H⋯F and C—H⋯π interactions.

Crystal structure of 2-[(3S,4S)-4-(anthracen-9-yl)-1-(4-meth-oxy-phen-yl)-2-oxoazetidin-3-yl]-2-aza-2H-phenalene-1,3-dione unknown solvate.

The central β-lactam ring of the title compound, C36H24N2O4, is almost planar (r.m.s. deviation = 0.003 Å) and makes dihedral angles of 17.17 (19), 89.76 (17) and 78.44 (17)° with the benzene ring, the anthracene ring (r.m.s. deviation = 0.003 Å) and the 1H-benzo[de]isoquinoline-1,3(2H)-dione moiety, which is nearly planar [maximum deviation = 0.098 (2) Å], respectively. The molecular structure is stabilized by an intramolecular C—H⋯N hydrogen bond. In the crystal, molecules are linked via C—H⋯π and π–π stacking interactions [centroid–centroid distances = 3.5270 (19) and 3.779 (2) Å], forming a three-dimensional structure. A region of disordered electron density, probably disordered solvent molecules, was treated with the SQUEEZE procedure in PLATON [Spek (2015 ▸). Acta Cryst. C71, 9–18], which indicated a solvent cavity of 322 Å3 containing approximately 91 electrons. Their formula mass and unit-cell characteristics were not taken into account during the refinement.

2-(4-Bromo­phen­yl)-4-(4-meth­oxy­phen­yl)-6,7,8,9-tetra­hydro-5H-cyclo­hepta­[b]pyridine

In the title compound, C23H22BrNO, the cycloheptane ring adopts a chair conformation. The pyridine ring makes dihedral angles of 58.63 (15) and 8.27 (16)° with the benzene rings. The dihedral angle between the benzene rings is 56.68 (17)°. The crystal packing features C—Br⋯π interactions [Br⋯centroid distances= 3.813 (2) and 3.839 (2) Å; C—Br⋯centroid = 126.25 (10) and 138.31 (10)°, respectively, forming a three dimensional supramolecular architecture.

N-[2-(4-Chloro-phen-yl)-5-methyl-4-oxo-1,3-thia-zolidin-3-yl]pyridine-3-carboxamide.

The title compound, C16H14ClN3O2S, crystallizes with two molecules in the asymmetric unit. In the 1,3-thiazolidine rings, the carbonyl O atoms, the S atoms, the methyl groups and the ring carbon attached to the methyl groups are disordered with occupancy ratios of 0.509 (7):0.491 (7) in one molecule and 0.464 (14):0.536 (14) in the other. The crystal structure is stabilized by intermolecular N—H⋯N, C—H⋯O hydrogen bonds and C—H⋯Cl interactions. In addition, there is a π–π stacking interaction [centroid–centroid distance = 3.794 (3) Å] between the benzene and pyridine rings.

4-(Methyl-amino)benzoic acid.

The asymmetric unit of the title compound, C8H9NO2, contains three crystallographically independent molecules, which are essentially planar, the carboxyl O atoms deviating by 0.091 (3), 0.101 (2) and 0.164 (3) Å from the mean plane through the non-H atoms. In the crystal, all three molecules form O—H⋯O hydrogen-bonded about inversion centers, forming eight-membered rings with graph-set notation R 2 2(8). In addition, N—H⋯O hydrogen bonding and C—H⋯π interactions reinforce the packing.

Crystal structure of 3,4a,7,7,10a-penta-methyl-3-vinyl-dodeca-hydro-1H-benzo[f]chromen-9-ol isolated from Sideritis perfoliata.

In the two independent molecules in the asymmetric unit of the title compound, the cyclohexane rings adopt a chair conformation, while the oxane rings are also puckered. In the crystal, O—H⋯ O hydrogen bonds connect adjacent molecules, forming a C(6) helical chain running along the [100] direction.