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The molecules of ethyl 5-amino-1-(4-cyanophenyl)-1H-imidazole-4-carboxylate, C13H12N4O2, are linked into a chain of alternating R22(10) and R44(34) rings by a combination of N-H
N and C-HN hydrogen bonds. In ethyl 5-amino-1-(4-chlorophenyl)-1H-imidazole-4-carboxylate, C12H12ClN3O2, where the ethyl group is disordered over two sets of sites, a combination of N-HO, N-HN, C-HN and C-H![[pi]](/logos/entities/pi_rmgif.gif)
(arene) hydrogen bonds links the molecules into complex sheets. Two intermolecular hydrogen bonds, one each of N-HN and C-HO types, link the molecules of ethyl 5-amino-1-(2,6-difluorophenyl)-1H-imidazole-4-carboxylate, C12H11F2N3O2, into a continuous three-dimensional framework structure.
N and C-HN hydrogen bonds. In ethyl 5-amino-1-(4-chlorophenyl)-1H-imidazole-4-carboxylate, C12H12ClN3O2, where the ethyl group is disordered over two sets of sites, a combination of N-HO, N-HN, C-HN and C-H(arene) hydrogen bonds links the molecules into complex sheets. Two intermolecular hydrogen bonds, one each of N-HN and C-HO types, link the molecules of ethyl 5-amino-1-(2,6-difluorophenyl)-1H-imidazole-4-carboxylate, C12H11F2N3O2, into a continuous three-dimensional framework structure.organic compounds
In the title compound, C13H10N4O3·H2O, the molecular components are linked into complex sheets by a combination of four types of hydrogen bonds.
organic compounds
In 2,3-dimethoxybenzaldehyde isonicotinoylhydrazone chloroform monosolvate, C15H15N3O3·CHCl3, the hydrazone molecules are linked by a combination of N—HN and C—HN hydrogen bonds into chains from which the chloroform molecules are pendent. 3,4,5-Trimethoxybenzaldehyde isonicotinoylhydrazone forms two stoichiometric hydrates. In the monohydrate, C16H17N3O4·H2O, the components are linked into sheets by a combination of O—HO, O—HN and N—HN hydrogen bonds, and in the dihydrate, C16H17N3O4·2H2O, a combination of O—HO, O—HN and N—HO hydrogen bonds links the components into a three-dimensional framework structure.
N and C—HN hydrogen bonds into chains from which the chloroform molecules are pendent. 3,4,5-Trimethoxybenzaldehyde isonicotinoylhydrazone forms two stoichiometric hydrates. In the monohydrate, C16H17N3O4·H2O, the components are linked into sheets by a combination of O—HO, O—HN and N—HN hydrogen bonds, and in the dihydrate, C16H17N3O4·2H2O, a combination of O—HO, O—HN and N—HO hydrogen bonds links the components into a three-dimensional framework structure.organic compounds
There are no direction-specific interactions between the molecules of 3-(2-methoxybenzyl)-2-(2-methoxyphenyl)-1,3-thiazolidin-4-one, C18H19NO3S, (I); the molecules of 3-(4-nitrobenzyl)-2-(4-nitrophenyl)-1,3-thiazolidin-4-one, C16H13N3O5S, (II), are linked by four independent C—HO hydrogen bonds into complex chains of fused rings. In 3-(4-methoxybenzyl)-2-(4-methoxyphenyl)-1,3-thiazolidin-4-one, (III), isomeric with (I), the molecules are linked into sheets by a combination of C—HO and C—Hπ(arene) hydrogen bonds, while in 3-(2-nitrobenzyl)-2-(2-nitrophenyl)-1,3-thiazolidin-4-one, (IV), isomeric with (II), the sheets are built from three independent C—HO hydrogen bonds and one C—Hπ(arene) hydrogen bond, and reinforced by an aromatic π–π stacking interaction. In 3-(2-fluorobenzyl)-2-(2-fluorophenyl)-1,3-thiazolidin-4-one, C16H13F2NOS, (V), where the 2-aryl ring exhibits orientational disorder, the molecules are linked into sheets by a combination of C—HO and C—Hπ(arene) hydrogen bonds, and the sheets are linked in pairs, forming bilayers, by an aromatic π–π stacking interaction.
O hydrogen bonds into complex chains of fused rings. In 3-(4-methoxybenzyl)-2-(4-methoxyphenyl)-1,3-thiazolidin-4-one, (III), isomeric with (I), the molecules are linked into sheets by a combination of C—HO and C—Hπ(arene) hydrogen bonds, while in 3-(2-nitrobenzyl)-2-(2-nitrophenyl)-1,3-thiazolidin-4-one, (IV), isomeric with (II), the sheets are built from three independent C—HO hydrogen bonds and one C—Hπ(arene) hydrogen bond, and reinforced by an aromatic π–π stacking interaction. In 3-(2-fluorobenzyl)-2-(2-fluorophenyl)-1,3-thiazolidin-4-one, C16H13F2NOS, (V), where the 2-aryl ring exhibits orientational disorder, the molecules are linked into sheets by a combination of C—HO and C—Hπ(arene) hydrogen bonds, and the sheets are linked in pairs, forming bilayers, by an aromatic π–π stacking interaction.organic compounds
In the title compound, C14H10N4O·H2O, the molecular components are linked into a three-dimensional framework by three hydrogen bonds, one each of the O—HO, O—HN and N—HO types, weakly augmented by two C—HO hydrogen bonds.
O, O—HN and N—HO types, weakly augmented by two C—HO hydrogen bonds.organic compounds
rac-2-Isopropyl-3-(2-nitrobenzyl)-1,3-thiadiazolin-4-one, C13H16N2O3S, is a rare example of a racemate crystallizing in the space group P212121, with one molecule each of S and R configurations, whose conformations are almost mirror images, within the asymmetric unit. The molecules of S configuration are linked by two C-HO hydrogen bonds into a three-dimensional framework, and the molecules of R configuration are linked by two further C-HO hydrogen bonds into a different type of three-dimensional framework; the two frameworks are linked by a fifth C-HO hydrogen bond.
O hydrogen bonds into a three-dimensional framework, and the molecules of R configuration are linked by two further C-HO hydrogen bonds into a different type of three-dimensional framework; the two frameworks are linked by a fifth C-HO hydrogen bond.organic compounds
The title compounds, namely 6-methoxy-3,3-dimethyl-3H-benzo[f]chromene, C16H16O2, (III), and racemic 3-bromo-2,2,6,6-tetramethyl-3,4-dihydro-2H,6H-1,5-dioxatriphenylene, C20H21BrO2, (IV), were both synthesized in one-step regioselective Wittig reactions from substituted 1,2-naphthoquinones. The new ring in both compounds adopts a screw-boat conformation. A single π–π stacking interaction links the molecules of (III) into centrosymmetric dimeric aggregates, and a single C—Hπ(arene) hydrogen bond links the molecules of (IV) into centrosymmetric dimers.
π(arene) hydrogen bond links the molecules of (IV) into centrosymmetric dimers.
