3-(2,4,6-Trimethyl­benzo­yl)-2-naphthoic acid

The asymmetric unit of the title compound, C21H18O3, contains two crystallographically independent mol­ecules. The two mol­ecules are linked into cyclic centrosymmetric dimers R 2 2(8) by O—H⋯O hydrogen bonds. The dihedral angles between the naphthalene ring system and the benzene ring are 87.0 (8) and 84.4 (2)° in the two mol­ecules. The crystal packing is stabilized by O—H⋯O, C—H⋯π and π–π inter­actions [centroid–centroid distance = 3.664 (11) Å]. In one mol­ecule, the mesityl ring is disordered over two positions [occupancy ratio 0.690 (3):0.690 (3)]

3-(6-Benz­yloxy-2,2-dimethyl­perhydro­furo[2,3-d][1,3]dioxolan-5-yl)-5-(4-chloro­phen­yl)-4-nitro-2-phenyl-2,3,4,5-tetra­hydro­isoxazole

In the title compound, C29H29ClN2O7, the isoxazole and dioxolane rings adopt envelope conformations, and the furan ring adopts a twisted conformation. The crystal structure is stabilized by inter­molecular C—H⋯π inter­actions between a benz­yloxy methyl­ene H atom and the 4-chloro­phenyl ring of an adjacent mol­ecule, and by weak non-classical inter­molecular C—H⋯O hydrogen bonds. In addition, the crystal structure exhibits a Cl⋯O halogen bond of 3.111 (3) Å, with a nearly linear C—Cl⋯O angle of 160.7 (1)°

4-(3-Eth­oxy-4-hydroxy­styr­yl)-1-methyl­pyridinium tosyl­ate monohydrate

In the title compound, C16H18NO2 +·C7H7O3S−·H2O, the dihedral angle between the pyridyl and benzene rings of the pyridinium cation is 0.2 (1)°. The benzene ring of the tosyl­ate anion makes a dihedral angle of 4.8 (2)° with the best mean plane of the pyridinium cation. The pyridinium cation and the tosyl­ate anion are hydrogen bonded to the water mol­ecule, and the crystal packing is further stabilized by inter­molecular C—H⋯O and π–π inter­actions [centroid–centroid separations of 3.648 (3) and 3.594 (2) Å

Crystal structure of ethyl (2S,2′ R)-1′-benzyl-3-oxo-3H-dispiro[1-benzothio-phene-2,3′-pyrrolidine-2′,11″-indeno-[1,2-b]quinoxaline]-4′-carboxylate

The authors thank the TBI X-ray facility, CAS in Crystallography and BioPhysics, University of Madras, Chennai, India, for the data collection.Peer reviewedPublisher PD

N-(2-Formyl­phen­yl)benzene­sulfonamide

In the title compound, C13H11NO3S, the two aromatic rings are oriented at an angle of 88.18 (8)°. Intra­molecular N—H⋯O and C—H⋯O hydrogen bonds are observed, each of which generates an S(6) ring motif. In the crystal, mol­ecules are linked into C(7) chains along [010] by inter­molecular C—H⋯O hydrogen bonds. The structure is further stabilized by inter­molecular C—H⋯π inter­actions involving the sulfonyl-bound phenyl ring

(E)-Methyl 3-(4-ethyl­phen­yl)-2-{2-[(E)-(hy­droxy­imino)­meth­yl]phen­oxy­meth­yl}acrylate

In the title compound, C20H21NO4, the two benzene rings are almost perpendicular to each other, making a dihedral angle of 86.1 (7)°. The hy­droxy­ethanimine group is essentially coplanar with the benzene ring, the largest deviation from the mean plane of the hy­droxy­ethanimine [C=N—OH] group being 0.011 (1) Å for the O atom. An intra­molecular C—H⋯O hydrogen bond occurs. The mol­ecules are linked into cyclic centrosymmetric R 2 2(6) dimers via O—H⋯N hydrogen bonds. Inter­molecular C—H⋯O hydrogen bonds link the mol­ecules, forming a C(8) chain along the a axis. The crystal packing is further stabilized by C—H⋯π inter­actions

4,5-Bis(1H-imidazol-1-ylmeth­yl)acridine monohydrate

In the title compound, C21H17N5·H2O, the dihedral angles between the acridine ring system and the imidazole rings are 78.8 (1) and 71.2 (1)°. The crystal packing is stabilized by O—H⋯N, C—H⋯O, C—H⋯π and π–π inter­actions [centroid–centroid separations = 3.732 (1) and 3.569 (1) Å]

3-(6-Benz­yloxy-2,2-dimethyl­perhydro­furo[2,3-d][1,3]dioxol-5-yl)-5-(4-bromo­phen­yl)-2-phenyl­perhydro­pyrrolo[3,4-d]isoxazole-4,6-dione

In the title compound, C31H29BrN2O7, the isoxazolidine ring adopts a twist conformation, while the tetrahydrofuran, dioxolone and pyrrole rings adopt envelope conformations. The structure is stabilized by inter­molecular C—H⋯O hydrogen bonds and C—H⋯π inter­actions

1-[(E)-2-Formyl-1-(4-methyl­phen­yl)ethen­yl]-3-(4-methyl­phen­yl)pyrazole-4-carbaldehyde

In the crystal structure of the title compound, C21H18N2O2, mol­ecules are linked through C—H⋯O inter­actions. Two symmetry-related mol­ecules form a cyclic centrosymmetric R 2 2(20) dimer. These dimers are further connected into chains running along the b axis

Naphthalene-2,3-diylbis[(2-thien­yl)methanone]

The asymmetric unit of the title compound, C20H12O2S2, contains two crystallographically independent mol­ecules which differ in the orientations of thienylmethanone units with respect to the naphthalene ring system [dihedral angles of 65.30 (11) and 50.94 (11)° in one molecule, 41.94 (12) and 69.61 (13)° in the other]. The crystal structure is stabilized by C—H⋯O and C—H⋯π inter­actions