(E)-3-(1,3-Diphenyl-1H-pyrazol-4-yl)-1-(thia-zol-2-yl)prop-2-en-1-one

In the title mol-ecule, C21H15N3OS, the C5=C6 double bond in the central enone group adopts a trans configuration. The dihedral angle between planes of the thia-zole and pyrazole rings is 6.6 (2)°. In the crystal, pairs of C-H⋯O hydrogen bonds generate inversion dimers and another pair of C-H⋯N hydrogen bonds link the dimers into chains propagating along a-axis direction.

2-[(4-Chloro-phen-yl)imino]-1,2-di-phenyl-ethanone

The title Schiff base, C₂₀H₁₄ClNO, obtained from the reaction of 4-chloro aniline with benzil, has an approximate T shape. The dihedral angle between the phenyl rings of the benzil unit is 74.14 (15)°. The extended structure features C-H⋯O hydrogen bonds.

Crystal structure and Hirshfeld surface analysis of (3aSR,6RS,6aSR,7RS,11bSR,11cRS)-2,2-dibenzyl-2,3,6a,11c-tetra-hydro-1H,6H,7H-3a,6:7,11b-di-epoxy-dibenzo[de,h]isoquinolin-2-ium tri-fluoro-methane-sulfonate

In the cation of the title salt, C30H28NO2 +·CF3O3S-, the four tetra-hydro-furan rings adopt envelope conformations. In the crystal, pairs of cations are linked by dimeric C-H⋯O hydrogen bonds, forming two R 2 2(6) ring motifs parallel to the (001) plane. The cations and anions are connected by further C-H⋯O hydrogen bonds, forming a three-dimensional network structure. Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H⋯H (47.6%), C⋯H/H⋯C (20.6%), O⋯H/H⋯O (18.0%) and F⋯H/H⋯F (9.9%) inter-actions.

Crystal structure of 2-oxo-1,2-di-phenyl-ethyl diiso-propyl-carbamate

The title compound, C21H25NO3, crystallized as a racemic twin in the Sohnke space group P21. In the mol-ecular structure of the title compound, both enanti-omers show a highly similar conformation with the urethane function and the benzoyl group showing an almost perpendicular arrangement [the dihedral angle is 72.46 (8)° in the S-enanti-omer and 76.21 (8)° in the R-enanti-omer]. In the crystal structure, mol-ecules of both enanti-omers show infinite helical arrangements parallel to the b axis formed by weak C-H⋯O hydrogen bonds between the phenyl ring of the benzoyl group and the carbamate carbonyl group. In case of the R-enanti-omer, this helix is additionally stabilized by a bifurcated hydrogen bond between the carbonyl function of the benzoyl group towards both phenyl groups of the mol-ecule.

Crystal structure and Hirshfeld surface analysis of 2,2,2-tri-chloro-N,N-bis-{[(1RS,4SR)-1,4-di-hydro-1,4-ep-oxy-naphthalen-1-yl]meth-yl}acetamide

In the title compound, C24H18Cl3NO3, the tetra-hydro-furan rings adopt envelope conformations. In the crystal, C-H⋯O hydrogen bonds connect mol-ecules, generating layers parallel to the (001) plane. These layers are connected along the c-axis direction by C-H⋯π inter-actions. The packing is further stabilized by inter-layer van der Waals and inter-halogen inter-actions. The most important contributions to the surface contacts are from H⋯H (36.8%), Cl⋯H/H⋯Cl (26.6%), C⋯H/H⋯C (18.8%) and O⋯H/H⋯O (11.3%) inter-actions, as concluded from a Hirshfeld surface analysis.

Crystal structure and Hirshfeld surface analysis of ethyl 2-[9-(2-hy-droxy-phen-yl)-3,3,6,6-tetra-methyl-1,8-dioxo-2,3,4,4a,5,6,7,8a,9,9a,10,10a-dodeca-hydro-acridin-10-yl]acetate

In the title compound, C27H33NO5, a 3,3,6,6-tetra-methyl-tetra-hydro-acridine-1,8-dione ring system carries an ethyl acetate substituent on the acridine N atom and an o-hy-droxy-phenyl ring on the central methine C atom of the di-hydro-pyridine ring. The benzene ring is inclined to the acridine ring system at an angle of 80.45 (7)° and this conformation is stabilized by an intra-molecular O-H⋯O hydrogen bond between the hy-droxy substituent on the benzene ring and one of the carbonyl groups of the acridinedione unit. The ester C=O oxygen atom is disordered over major and minor orientations in a 0.777 (9):0.223 (9) ratio and the terminal -CH3 unit of the ethyl side chain is disordered over two sets of sites in a 0.725 (5): 0.275 (5) ratio. In the crystal, C-H⋯O hydrogen bonds combine to link the mol-ecules into a three-dimensional network. van der Waals H⋯H contacts contribute the most to the Hirshfeld surface (66.9%) followed by O⋯H/H⋯O (22.1%) contacts associated with weak hydrogen bonds.

Crystal structures, Hirshfeld atom refinements and Hirshfeld surface analyses of tris-(4,5-di-hydro-furan-2-yl)methyl-silane and tris-(4,5-di-hydro-furan-2-yl)phenyl-silane

The title compounds, C13H18O3Si (1) and C18H20O3Si (2), represent functional-izable di-hydro-furan-ylsilanes, which permit substitution by a variety of nucleophiles. The crystal structures of 1 and 2 display weak inter-molecular C-H⋯O hydrogen-bonding inter-actions (qu-anti-fied by Hirshfeld surface analysis), leading to a two-dimensional supra-molecular network for 1 and a one-dimensional supra-molecular network for 2. The crystal structures of 1 and 2 were refined both on the basis of the independent atom model (IAM) and the Hirshfeld atom refinement (HAR) approach, and the results are comparatively discussed.

Crystal structure of 1-[(4-methylbenzene)sulfonyl]pyrrolidine

The mol-ecular structure of the title compound, C11H15NO2S, features a sulfonamide group with S=O bond lengths of 1.4357 (16) and 1.4349 (16) Å, an S-N bond length of 1.625 (2) Å, and an S-C bond length of 1.770 (2) Å. When viewing the mol-ecule down the S-N bond, both N-C bonds of the pyrrolidine ring are oriented gauche to the S-C bond with torsion angles of -65.6 (2)° and 76.2 (2)°. The crystal structure features both intra- and inter-molecular C-H⋯O hydrogen bonds, as well as inter-molecular C-H⋯π and π-π inter-actions, leading to the formation of sheets parallel to the ac plane.

Crystal structures and Hirshfeld surface analyses of 4,4'-{[1,3-phenyl-enebis(methyl-ene)]bis-(-oxy)}bis-(3-meth-oxy-benzaldehyde) and 4,4'-{[(1,4-phenyl-ene-bis(methyl-ene)]bis-(-oxy)}bis-(3-meth-oxy-benzalde-hyde)

The title compounds, C24H22O6 (I) and C24H22O6 (II), each crystallize with half a mol-ecule in the asymmetric unit. The whole mol-ecule of compound (I) is generated by twofold rotation symmetry, the twofold axis bis-ecting the central benzene ring. The whole mol-ecule of compound (II) is generated by inversion symmetry, the central benzene ring being located on an inversion center. In (I), the outer benzene rings are inclined to each other by 59.96 (10)° and by 36.74 (9)° to the central benzene ring. The corresponding dihedral angles in (II) are 0.0 and 89.87 (12)°. In the crystal of (I), mol-ecules are linked by C-H⋯O hydrogen bonds and C-H⋯π inter-actions, forming ribbons propagating along the [10] direction. In the crystal of (II), mol-ecules are linked by C-H⋯O hydrogen bonds, forming a supra-molecular framework. The Hirshfeld surface analyses indicate that for both compounds the H⋯H contacts are the most significant, followed by O⋯H/H⋯O and C⋯H/H⋯C contacts.

Crystal structure and Hirshfeld surface analysis of dimethyl (1R*,3aS*,3a1 R*,6aS*,9R*,9aS*)-3a1,5,6,9a-tetra-hydro-1H,4H,9H-1,3a:6a,9-di-epoxy-phenalene-2,3-di-carboxyl-ate

The title di-epoxy-phenalene derivative, C17H18O6, comprises a fused cyclic system containing four five-membered rings (two di-hydro-furan and two tetra-hydro-furan) and one six-membered ring (cyclo-hexa-ne). The five-membered di-hydro-furan and tetra-hydro-furan rings adopt envelope conformations, and the six-membered cyclo-hexane ring adopts a distorted chair conformation. Two methyl carboxyl-ate groups occupy adjacent positions (2- and 3-) on a tetra-hydro-furan ring. In the crystal, two pairs of C-H⋯O hydrogen bonds link the mol-ecules to form inversion dimers, enclosing two R 2 2(6) ring motifs, that stack along the a-axis direction and are arranged in layers parallel to the bc plane.

Crystal structure of 2-oxo-2H-chromen-7-yl 4-fluoro-benzoate

In the title compound, C16H9FO4, (I), the benzene ring is oriented at an acute angle of 59.03 (15)° relative to the coumarin plane (r.m.s deviation = 0.009 Å). This conformation of (I) is stabilized by an intra-molecular C-H⋯O hydrogen bond, which closes a five-membering ring. In the crystal, mol-ecules of (I) form infinite zigzag chains along the b-axis direction, linked by C-H⋯O hydrogen bonds. Furthermore, the crystal structure is supported by π-π stacking inter-actions between neighbouring pyrone and benzene or coumarin rings [centroid-centroid distances in the range 3.5758 (18)-3.6115 (16) Å], as well as C=O⋯π inter-actions [O⋯centroid distances in the range 3.266 (3)-3.567 (3) Å]. The theoretical data for (I) obtained from quantum chemical calculations are in good agreement with the observed structure, although the calculated C-O-C-C torsion angle between the coumarin fragment and the benzene ring (73.7°) is somewhat larger than the experimental value [63.4 (4)°]. Hirshfeld surface analysis has been used to confirm and qu-antify the supra-molecular inter-actions.

Crystal structure of methyl (Z)-2-[(Z)-3-methyl-2-({(E)-1-[(R*)-4-methyl-cyclo-hex-3-en-1-yl]ethyl-idene}hydrazinyl-idene)-4-oxo-thia-zolidin-5-yl-idene]acetate

The new title 4-thia-zolidinone derivative, C16H21N3O3S, was obtained from the cyclization reaction of 4-methyl-3-thio-semicarbazone and dimethyl acetyl-enedi-carboxyl-ate (DMAD). The cyclo-hexyl-idene ring has an envelope conformation with the stereogenic centre C atom as the flap. Its mean plane makes a dihedral angle of 56.23 (9)° with the thia-zolidine ring mean plane. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds forming chains propagating in the [001] direction. Within the chains there are offset π-π inter-actions between the thia-zolidine rings of inversion-related mol-ecules [centroid-centroid distance = 3.703 (1) Å]. The chains are linked by further C-H⋯O hydrogen bonds, forming slabs parallel to the ac plane.

Crystal and geometry-optimized structure, and Hirshfeld surface analysis of 1-(2-bromo-eth-yl)indoline-2,3-dione

In the title compound, the isatin (1H-indole-2,3-dione) moiety is almost planar (r.m.s. deviation = 0.026 Å). In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds, forming layers parallel to the ab plane, and enclosing (24) loops.

In the title compound, C₁₀H₈BrNO₂, the isatin (1H-indole-2,3-dione) moiety is nearly planar (r.m.s. deviation = 0.026 Å). In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds, forming layers parallel to the ab plane, and enclosing R₄⁴(24) loops. There are a low percentage (19.3%) of inter­molecular H⋯H contacts in the structure, as estimated by the analysis of Hirshfeld surfaces. This could be due to the presence of the Br atom, present in the bromo­ethyl­ene group, which makes ca 18.7% Br⋯H contacts.

Crystal structure of bergapten: a photomutagenic and photobiologically active furan-ocoumarin

The title mol­ecule, bergapten, a psoralen/furan­ocoumarin derivative, possesses photocarcinogenic and photomutagenic activity. In the crystal, mol­ecules are linked via C—H⋯O hydrogen bonds, forming a three-dimensional framework.

The title compound, C₁₂H₈O₄, is a furan­ocoumarin [systematic name: 4-meth­oxy-7H-furo[3,2-g]chromen-7-one], which was isolated from the Indian herb T. stictocarpum. The mol­ecule is almost planar with an r.m.s. deviation of 0.024 Å for the hetero atoms of the fused-ring system. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds, forming a three-dimensional framework. There are offset π–π inter­actions present involving the coumarin moieties stacking along the a-axis direction [shortest inter-centroid distance = 3.717 (3) Å].

Crystal structure of 5-bromo-1-ethyl-indoline-2,3-dione

The title compound, C10H8BrNO2, crystallizes with two independent molcules (A and B) in the asymmetric unit. In each mol-ecule, the indoline ring system is almost planar, with the largest deviation from the mean plane being 0.016 (2) Å in mol-ecule A and 0.040 (13) Å in mol-ecule B. In each mol-ecule, the ethyl group is nearly perpendicular to the indoline ring system with C-C-N-C torsion angles of -94.8 (3) and 93.0 (3)° in mol-ecules A and B, respectively. In the crystal, the two mol-ecules are inclined to each other, making a dihedral angle of 6.28 (8)°. In the molecular packing, the A and B mol-ecules are linked by C-H⋯O hydrogen bonds, forming -A-B-A-B- chains along [01-1]. Parallel chains are linked via a weak slipped parallel π-π inter-action [inter-centroid distance = 3.6107 (14) Å] and a short Br⋯O contact [3.183 (2) Å], forming a three-dimensional structure.

Crystal structure of 1,1'-[selanediyl-bis(4,1-phenyl-ene)]bis-(2-chloro-ethan-1-one)

In the title mol­ecule, C₁₆H₁₂Cl₂O₂Se, the C—Se—C angle is 100.05 (14)°, with the dihedral angle between the planes of the benzene rings being 69.92 (17)°. The average endocyclic angles (Se—C_ar—C_ar; ar = aromatic) facing the Se atom are 120.0 (3) and 119.4 (3)°. The Se atom is essentially coplanar with the benzene rings, with Se—C_ar—C_ar—C_ar torsion angles of −179.2 (3) and −179.7 (3)°. In the crystal, mol­ecules are linked via C—H⋯O hydrogen bonds forming chains propagating along the a-axis direction. The chains are linked via C—H⋯π inter­actions, forming a three-dimensional network.

Crystal structure of 13-phenyl-2,3,4,13-tetra-hydro-1H-indazolo[1,2-b]phthalazine-1,6,11-trione

The title compound, C21H16N2O3, consists of an indazolone moiety, bearing a phenyl group, fused to a phthalazine ring system (r.m.s. deviation = 0.018 Å). The phenyl ring is almost normal to the mean plane of the five-membered ring of the indazolone moiety, making a dihedral angle of 89.64 (7)°. The six-membered ring of the indazolone moiety has an envelope conformation, with the central methyl-ene C atom as the flap. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds, forming slabs parallel to the bc plane. The slabs are linked via C-H⋯π and π-π inter-actions [the shortest inter-centroid distance involving rings of pyrazolo-phthalazine moieties is 3.6430 (8) Å], forming a three-dimensional structure.

Crystal structure of 2α-(1,1-di-phenyl-eth-yl)-4-methyl-4α,5α-diphenyl-1,3-dioxolane: the result of a non-acid pinacol rearrangement

The title compound, C30H28O2, was obtained during recrystallization of (±)-1,2-diphenyl-1,2-propane-diol in 1-butanol, from an unexpected non-acid-catalyzed pinacol rearrangement followed by acetal formation of the newly formed aldehyde with the diol. The tri-substituted dioxolane ring has a twist conformation on the C-O bond opposite the methyl-substituted C atom. There is an intra-molecular C-H⋯π inter-action present involving one of the di-phenyl-ethyl rings and an H atom of the phenyl ring in position 4 of the dioxolane ring. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds, forming chains along [001]. The chains are linked by a second C-H⋯π inter-action, forming sheets parallel to the bc plane.

Crystal structure of 8-eth-oxy-3-(4-nitro-phen-yl)-2H-chromen-2-one

In the title compound, C17H13NO5, the coumarin ring system is essentially planar (r.m.s. deviation = 0.008 Å). The nitro-phenyl ring makes a dihedral angle of 25.27 (9)° with the coumarin ring plane. The nitro group is almost coplanar with the phenyl ring to which it is attached, making a dihedral angle of 4.3 (3)°. The eth-oxy group is inclined to the coumarin ring plane by 4.1 (2)°. Electron delocalization was found at the short bridging C-C bond with a bond length of 1.354 (2) Å. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds, forming sheets in the bc plane. The sheets are linked via π-π stacking [centroid-centroid distances = 3.5688 (13) and 3.7514 (13) Å], forming a three-dimensional structure.

Crystal structure of methyl (3RS,4SR,4aRS,11aRS,11bSR)-5-oxo-3,4,4a,5,7,8,9,10,11,11a-deca-hydro-3,11b-ep-oxy-azepino[2,1-a]iso-indole-4-carboxyl-ate

The title compound, C₁₅H₁₉NO₄, is the a product of the esterification of the corresponding carbonic acid with methanol. The mol­ecule comprises a fused tetra­cyclic system containing three five-membered rings (2-pyrrolidinone, tetra­hydro­furan and di­hydro­furan) and one seven-membered ring (azepane). The five-membered rings have the usual envelope conformations, with the quaternary C atom being the flap atom for the 2-pyrrolidinone ring, and the ether O atom being the common flap atom for the remaining rings. The seven-membered azepane ring adopts a chair conformation with the methine and middle methyl­ene C atoms lying above and below the mean plane defined by the remaining five atoms. The carboxyl­ate substituent is rotated by 77.56 (5)° with respect to the base plane of the tetra­hydro­furan ring. In the crystal, the mol­ecules are bound by weak C—H⋯O hydrogen-bonding inter­actions into puckered layers parallel to (001).

Crystal structure of 13-(2-meth-oxy-phenyl)-3,4-di-hydro-2H-indazolo[1,2-b]phthalazine-1,6,11(13H)-trione

In the title compound, C22H18N2O4, the three fused rings of the pyrazolo-phthalazine moiety are coplanar (r.m.s. deviation = 0.027 Å). The cyclo-hexene ring fused to the pyrazolidine ring, so forming the indazolophthalazine unit, has a half-chair conformation. The benzene ring is almost normal to the mean plane of the pyrazolo-phthalazine moiety, with a dihedral angle of 87.21 (6)° between their planes. In the crystal, mol-ecules are linked by pairs of C-H⋯O hydrogen bonds forming inversion dimers. The dimers are linked via C-H⋯π inter-actions, forming slabs parallel to (100). Between the slabs there are weak π-π inter-actions [shortest inter-centroid distance = 3.6664 (9) Å], leading to the formation of a three-dimensional structure.

Crystal structure of 2,5-dimethyl-3-(2-methyl-phenyl-sulfin-yl)-1-benzo-furan

In the title compound, C17H16O2S, the dihedral angle between the benzo-furan ring system [r.m.s. deviation = 0.009 (1) Å] and the 2-methyl-phenyl ring is 86.72 (4)°. In the crystal, weak C-H⋯O hydrogen bonds link the mol-ecules into columns along the b-axis direction.

Crystal structure of methyl 7-phenyl-6a,7,7a,8,9,10-hexa-hydro-6H,11aH-thio-chromeno[3,4-b]pyrrolizine-6a--carbox-ylate

In the title compound, C₂₂H₂₃NO₂S, the inner pyrrolidine ring (A) adopts an envelope conformation with the methine C atom opposite the fused C—N bond as the flap. The thio­pyran ring (C) has a half-chair conformation and its mean plane is inclined to the fused benzene ring by 1.74 (11)°, and by 60.52 (11)° to the mean plane of pyrrolidine ring A. In the outer pyrrolidine ring (B), the C atom opposite the fused C—N bond is disordered [site-occupancy ratio = 0.427 (13):0.573 (13)] and both rings have envelope conformations, with the disordered C atom as the flap. The planes of the phenyl ring and the benzene ring of the thio­chromane unit are inclined to one another by 65.52 (14)°. In the crystal, mol­ecules are linked by a pair of C—H⋯O hydrogen bonds forming inversion dimers.

Crystal structure of ethyl 4-(2,4-di-chloro-phen-yl)-2-methyl-4H-benzo[4,5]thia-zolo[3,2-a]pyrimidine-3-carboxyl-ate

In the title compound, C20H16Cl2N2O2S, the pyrimidine ring has a screw-boat conformation. The attached di-chloro-phenyl ring is twisted at an angle of 89.29 (13)° with respect to the pyrimidine ring mean plane. The benzo-thia-zole group is approximately planar (r.m.s. deviation = 0.008 Å) and inclined to the pyrimidine ring mean plane by 3.04 (10)°. The carboxyl-ate group assumes an extended conformation with respect to the pyrimidine ring, which can be seen from the O=C-O-C torsion angle of 3.2 (4) °. In the crystal, mol-ecules are linked via C-H⋯O and C-H⋯N hydrogen bonds, forming slabs lying parallel to (100).

Cystal structre of 5-hy-droxy-2-nitro-benzaldehyde

In the title compound, C₇H₅NO₄, the nitro group and the aldehyde group are inclined to the benzene ring by 16.6 (3) and 15.6 (3)°, respectively. In the crystal, mol­ecules are linked via O—H⋯O hydrogen bonds, forming chains along [100]. The chains are linked by C—H⋯O hydrogen bonds, forming a three-dimensional structure.

Crystal structure of ethyl 2-(3,5-di-fluoro-phen-yl)quinoline-4-carboxyl-ate

In the title compound, C18H13F2NO2, the two rings of the quinoline system are fused almost coaxially, with a dihedral angle between their planes of 2.28 (8)°. The plane of the attached benzene ring is inclined to the plane of the quinoline system by 7.65 (7)°. The carboxyl-ate group attached to the quinoline system is in an anti-periplanar conformation. There is a short intra-molecular C-H⋯O contact involving the carbonyl group. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds, forming chains lying in the (1-10) plane.

Crystal structures of 1-(4-chloro-phen-yl)-2-(di-phenyl-phosphor-yl)ethan-1-one and 1-(di-phenyl-phosphor-yl)-3,3-di-methyl-butan-2-one

The title compounds were synthesized via an Arbuzov reaction between an α-bromo­ketone and isopropoxydi­phenyl­phosphane. In the crystals of both compounds, mol­ecules are linked via bifurcated C—H⋯(O,O) hydrogen bonds, forming chains propagating along [100] and along [010].

The title compounds, C₂₀H₁₆ClO₂P, (I), and C₁₈H₂₁O₂P, (II), were synthesized via an Arbuzov reaction between an α-bromo­ketone and isopropoxydi­phenyl­phosphane. In the crystals of both compounds, mol­ecules are linked via bifurcated C—H⋯(O,O) hydrogen bonds, forming chains propagating along [100] for (I) and along [010] for (II). The chains are linked via C—H⋯π inter­actions, leading to the formation of sheets lying parallel to (010) for (I) and (001) for (II). The absolute structure of compound (II) was determined by resonant scattering [Flack parameter = 0.088 (14)].

Crystal structure of methyl (E)-2-(1-methyl-2-oxoindolin-3-yl-idene)acetate

The title compound, C₁₂H₁₁NO₃, is essentially planar, with the mean plane of the acetate side chain [–C—C(=O)—O—C] being inclined to the mean plane of the indole ring system by 12.49 (7)°. The five- and six-membered rings of the indole group are almost coplanar, making a dihedral angle of 1.76 (8)°. The conformation about the C=C bond is E and there is an intra­molecular C—H⋯O hydrogen bond present. In the crystal, mol­ecules are linked by pairs of C—H⋯O hydrogen bonds forming inversion dimers, with an R₂²(16) ring motif. The dimers are linked by a second pair of C—H⋯O hydrogen bonds, enclosing R₂²(16) ring motifs, forming ribbons lying parallel to (-114). The ribbons are linked via C—H⋯π inter­actions, forming a three-dimensional structure.

Mol-ecular and crystal structure of gossypol tetra-methyl ether with an unknown solvate

The title compound consists of two planar halves. There is one half-mol­ecule in the asymmetric unit, the whole mol­ecule being generated by twofold rotation symmetry. The crystal structure has wide channels of 5–6 Å in diameter extending along the c-axis direction. The mol­ecules are associated into a three-dimensional network supported by some weak C—H⋯O hydrogen bonds and C—H⋯π inter­actions.

The title compound, C₃₄H₃₈O₈ (systematic name: 5,5′-diisopropyl-2,2′,3,3′-tetra­meth­oxy-7,7′-dimethyl-2H,2′H-8,8′-bi­[naphtho­[1,8-bc]furan]-4,4′-diol), has been obtained from a gossypol solution in a mixture of dimethyl sulfate and methanol. The mol­ecule is situated on a twofold rotation axis, so the asymmetric unit contains one half-mol­ecule. In the mol­ecule, the hy­droxy groups are involved in intra­molecular O—H⋯O hydrogen bonds, and the two naphthyl fragments are inclined each to other by 83.8 (1)°. In the crystal, weak C—H⋯O and C—H⋯π inter­actions consolidate the packing, which exhibits channels with an approximate diameter of 6 Å extending along the c-axis direction. These channels are filled with highly disordered solvent mol­ecules, so their estimated scattering contribution was subtracted from the observed diffraction data using the SQUEEZE option in PLATON [Spek, A. L. (2015). Acta Cryst. C71, 9–18].

Crystal structure of (2-methyl-1-phenyl-sulfon-yl-1H-indol-3-yl)(phen-yl)methanone

In the title compound, the indole ring system makes the dihedral angles of 84.89 (7) and 57.32 (5)° with the phenyl rings. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds.

In the title compound, C₂₂H₁₇NO₃S, the sulfonyl-bound phenyl ring is almost orthogonal to the indole ring system, making a dihedral angle of 84.89 (7)°. The carbonyl-bound phenyl ring forms a dihedral angle of 57.32 (5)° with the indole ring system. The two phenyl rings are inclined at 52.68 (7)°. The S atom has a distorted tetra­hedral configuration. In the crystal, weak C—H⋯O inter­actions link the mol­ecules, forming a helical chain along the b-axis direction.

Crystal structure of 1-(4-meth-oxy-phen-yl)-4-(4-nitro-phen-yl)-3-phen-oxy-azetidin-2-one

In the title compound, C22H18N2O5, the central β-lactam ring (r.m.s. deviation = 0.002 Å) makes dihedral angles of 64.21 (14), 82.35 (12) and 20.66 (13)° with the phenyl ring and the nitro- and meth-oxy-benzene rings, respectively. The mol-ecular structure is stabilized by an intra-molecular C-H⋯O hydrogen bond. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds, forming slabs lying parallel to (111). The slabs are linked via C-H⋯π inter-actions, forming a three-dimensional network.

Crystal structure of 5-chloro-2-(3-fluoro-phen-yl)-3-methyl-sulfinyl-1-benzo-furan

In the title compound, C15H10ClFO2S, the dihedral angle between the plane of the benzo-furan ring system [r.m.s. deviation = 0.013 (1) Å] and that of the 3-fluoro-phenyl ring [r.m.s. deviation = 0.005 (1) Å] is 31.36 (5)°. In the crystal, mol-ecules are linked by two different pairs of C-H⋯O hydrogen bonds, forming inversion dimers.

Crystal structure of 5-chloro-2,7-dimethyl-3-[(4-methyl-phenyl)-sulfon-yl]-1-benzo-furan

In the title compound, C17H15ClO3S, the dihedral angle between the planes of the benzo-furan ring system [r.m.s. deviation = 0.008 Å] and the 4-methyl-phenyl ring is 77.29 (4)°. In the crystal, mol-ecules are linked by π-π inter-actions between the benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.847 (2) Å] and between the benzene and furan rings of neighbouring mol-ecules [centroid-centroid distance = 3.743 (2) Å]. The mol-ecules are stacked along the a-axis direction. In addition, pairs of C-H⋯O hydrogen bonds are observed between inversion-related dimers: these generate R 2 (2)(12) loops.

Crystal structure of 5-chloro-3-cyclo-hexyl-sulfinyl-2,4,6-trimethyl-1-benzo-furan

In the title compound, C17H21ClO2S, the cyclo-hexyl ring adopts a chair conformation with the C-S bond in an equatorial orientation. In the crystal, mol-ecules are linked by C-H⋯O and C-H⋯π hydrogen bonds and a Cl⋯π [3.594 (2) Å] contact into chains along the a-axis direction.