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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).

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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.

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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.

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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].

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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—Car (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).

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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).

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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.
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