1-[2-Hy­droxy-4-(prop-2-yn-1-yl­oxy)phen­yl]ethanone

In the title compound, C₁₁H₁₀O₃, there is an intra­molecular O—H...O hydrogen bond generating an S(6) ring motif. The O atom of the hy­droxy group deviates by 0.0200 (1) Å from the benzene ring to which it is attached. The propyne group is almost linear, the C—C[triple bond]C angle being 177.83 (15)°, and is almost coplanar with the benzene ring; the C—C—O—C torsion angle being only −1.1 (2)°. In the crystal, mol­ecules are linked via C—H...O hydrogen bonds, forming infinite C(11) chains running parallel to [103]. These chains are linked by a pair of C—H...O hydrogen bonds, enclosing R₂²(8) inversion dimers, forming a corrugated two-dimensional network lying parallel to (103).

Crystal structure of bis[4-(di­methyl­amino)­pyridinium] bis(2-nitro­benzoate) trihydrate

The title salt crystallized with two anions and two cations in the asymmetric unit, together with three water mol­ecules. In the crystal, the anions are linked via O—H...O hydrogen bonds, involving the water mol­ecules, forming chains along [100] and the cations are linked to these chains by N—H...O hydrogen bonds.

3-[(E)-2-(2-Meth­oxy­phen­yl)vin­yl]-5,5-di­methyl­cyclo­hex-2-enone

The title compound, C₁₇H₂₀O₂, has an E conformation about the bridging C=C bond. The cyclo­hexene ring adopts an envelope conformation with the dimethyl-substituted C atom as the flap. Its mean plane makes a dihedral angle of 7.20 (12)° with the benzene ring. In the crystal, neighbouring mol­ecules are connected via C—H...O hydrogen bonds, forming chains running along the a-axis direction.

(E)-3-Isopropyl-1-methyl-2,6-di­phenyl­piperidin-4-one O-nicotinoyl oxime

In the title compound, C₂₇H₂₉N₃O₂, the piperidine ring exists in a chair conformation with an equatorial orientation of the phenyl and methyl substituents. The C—C=N bond angles are significantly different [119.1 (2) and 127.2 (2)°]. The phenyl rings are inclined to one another by 44.90 (14)°, and by 80.85 (13) and 79.62 (12)° to the mean plane of the piperidine ring. The terminal pyridine ring is inclined to the piperidine ring mean plane by 74.79 (15)°. In the crystal, mol­ecules are linked by C—H...π inter­actions, forming a three-dimensional network.

(Z)-3-[(2-Amino­benz­yl)amino]-1-phenyl­but-2-en-1-one

In the title compound, C₁₇H₁₈N₂O, the aromatic rings are almost normal to one another, making a dihedral angle of 89.00 (8)°. There is an intra­molecular N—H...O hydrogen bond in the mol­ecule enclosing an S(6) ring motif. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds, forming chains along [010].

2-[(4,6-Di­amino­pyrimidin-2-yl)sulfan­yl]-N-(2-methyl­phen­yl)acetamide

In the title compound, C₁₃H₁₅NOS, the plane of the pyrimidine ring makes a dihedral angle of 54.73 (9)° with that of the o-tolyl ring. The mol­ecule adopts an extended conformation, which is evident from the C—C(=O)—N—C_ar (ar = aromatic) torsion angle of 178.42 (15)°. In the crystal, mol­ecules are linked via pairs of N—H...N hydrogen bonds, forming inversion dimers with an R²₂(8) ring motif. The dimers are linked by N—H...O and C—H...O hydrogen bonds, with the O atom accepting three such interactions, forming sheets parallel to (100).

An amide cyclo­phane

The title compound, 8,18-dithia-2,6-diaza-13(1,4)-piperidina-1(1,2),4(1,3),7(1,2)-tribenzenaoctadecaphane-10,15-diyne-3,6-dione, C₃₂H₃₀N₄O₂S₂, is composed of a relatively planar bis­(2-mercaptophen­yl)isophthalamide unit linked to a bridging 1,4-di(but-2-yn-1-yl)piperazine unit, forming a macrocycle. The isophthalamide ring is inclined to the outer mercaptophenyl rings by 8.18 (11) and 5.59 (10)°, while these two rings are inclined to one another by 9.10 (12)°. The piperazine ring adopts a chair conformation. There are two intra­molecular N—H...S hydrogen bonds generating S(5) ring motifs. In the crystal, mol­ecules are linked via C—H...S and C—H...O hydrogen bonds, forming slabs lying parallel to (001). An O atom in the isophthalamide group is disordered over two positions with an occupancy ratio of 0.41 (6):0.59 (6).

(2E)-2-Benzyl­idene-9-phenyl-3,4-di­hydro­acridin-1(2H)-one

In the title compound, C₂₆H₁₉NO, the plane of the aromatic heterocycle makes a dihedral angle of 75.22 (4)° with that of the attached phenyl ring. In the crystal, mol­ecules are connected by C—H...O inter­actions, generating R₂²(12) dimers. These dimers are further connected by C—H...π inter­actions, linking the mol­ecules into chains running along the a-axis direction.

Crystal structure of 4-acetyl­phenyl 3-methyl­benzoate

The planes of the aromatic rings of the title compound, C₁₆H₁₄O₃, make a dihedral angle of 82.52 (8)°. The acetyl group and the phenyl ring make a dihedral angle of 1.65 (1)°. In the crystal, the molecules are linked by C—H...O interactions, generating C(7) chains along the a-axis direction.

Crystal structure of 6-(4-chloro­phen­yl)-6a-nitro-6,6a,6b,7,9,11a-hexa­hydro­spiro[chromeno[3′,4′:3,4]pyrrolo­[1,2-c]thia­zole-11,11′-indeno­[1,2-b]quinoxaline] chloro­form monosolvate

In the title compound, C₃₃H₂₃ClN₄O₃S·CHCl₃, the thia­zole ring adopts an envelope conformation with the N atom as the flap, and the pyrrolidine ring adopts a half-chair conformation. The thia­zole ring mean plane makes a dihedral angle of 59.31 (1)° with the pyrrolidine ring mean plane, 71.67 (1)° with the chromene ring and 82.59 (1)° with the chloro­benzene ring. An intra­molecular C—H...N hydrogen bond occurs. In the crystal, a second C—H...N hydrogen bond links the main and solvent mol­ecules. The solvent chloroform molecule is disordered about two positions with an occupancy ratio of 0.508 (14):0.492 (14).