123 research outputs found
1-Methyl-3-(2-methylphenyl)-3,3a,4,9b-tetrahydro-1H-chromeno[4,3-c][1,2]oxazole-3a-carbonitrile
In the title compound, C19H18N2O2, the five-membered isoxazole ring adopts an envelope conformation and the deviation of the N atom from the mean plane of the isoxazole ring is −0.3256 (11) Å. The pyran ring adopts a half-chair conformation. The isoxazole ring forms dihedral angles of 44.07 (7) and 84.23 (7)° with the pyran and methylbenzene rings, respectively. The molecular structure is stabilized by weak C—H⋯π interactions
Methyl (Z)-2-[(4-bromo-2-formylphenoxy)methyl]-3-(4-methylphenyl)acrylate
In the title compound, C19H17BrO4, the dihedral angle between the two benzene rings is 82.9 (2)°. The molecular structure is stabilized by an intramolecular C—H⋯O hydrogen bond, which generates an S(7) ring motif. The crystal packing is stabilized by C—H⋯O hydrogen bonds, which generate two centrosymmetic ring systems with R22(18) and R22(14) graph-set motifs. The crystal packing is further stabilized by intermolecular π–π interactions [centroid–centroid distance = 3.984 (2) Å]
(E)-2-(2-Formylphenoxymethyl)-3-phenylprop-2-enenitrile
In the title compound, C17H13NO2, the dihedral angle between the benzene and the phenyl ring is 65.92 (7)°. The carbonitrile side chain is almost linear, the C—C—N angle being 175.55 (14)°. The crystal structure is stabilized by intermolecular C—H⋯O interactions
(E)-6-Methyl-3-(2-methylbenzylidene)chroman-2-one
In the title compound, C18H16O2, the heterocyclic ring of the chroman-2-one system adopts a slightly distorted screw-boat conformation. The dihedral angle between the least-squares planes of the coumarin ring system and the benzene ring is 67.5 (1)°. The crystal packing features C—H⋯O hydrogen bonds, which link the molecules into centrosymmetric R22(8) dimers, and C—H⋯π interactions
(E)-2-[(2-Formylphenoxy)methyl]-3-(4-methylphenyl)prop-2-enenitrile
In the title compound, C18H15NO2, the dihedral angle between the two benzene rings is 74.8 (1)°. The carbonitrile chain is almost linear, the C—C—N angle being 176.2 (2)°. In the crystal, π–π interactions [centroid–centroid distance = 3.842 (1) Å] are observed
1-Methyl-3-(2-methylphenyl)-3a-nitro-1,2,3,3a,4,9b-hexahydrochromeno[4,3-b]pyrrole
The asymmetric unit of the title compound, C19H20N2O3, contains two independent molecules in both of which the pyrrolidine ring adopts an envelope conformation, but with a C atom as the flap in one molecule and the N atom in the other. The pyran ring adopts a half-chair conformation in both molecules. In the crystal, molecules are linked via C—H⋯O hydrogen bonds and C—H⋯π interactions
Methyl (2Z)-2-{[N-(2-formylphenyl)-4-methylbenzenesulfonamido]methyl}-3-(naphthalen-1-yl)prop-2-enoate
In the title compound, C29H25NO5S, the sulfonyl-bound benzene ring forms dihedral angles of 42.1 (1) and 48.5 (1)°, respectively, with the formyl-substituted benzene ring and the naphthalene residue. In the crystal, pairs of C—H⋯O interactions lead to the formation of R
2
2(10) inversion dimers, which are linked by further C—H⋯O interactions into supramolecular tapes running along [100]. The crystal packing is further stabilized by C—H⋯π interactions
(2S,5S,6R)-5-(4-Methylphenyl)-3-phenyl-4,8-dioxa-3-azatricyclo[7.4.0.02,6]trideca-1(13),9,11-triene-6-carbonitrile
In the title compound, C24H20N2O2, the six-membered pyran ring adopts a half-chair conformation with one C atom deviating from the mean plane of the remaining ring atoms by 0.654 (6) Å. The five-membered isoxazole ring adopts an N-envelope conformation with the N atom displaced by 0.742 (5) Å from the mean plane formed by the remaining ring atoms. The carbonitrile side chain is almost linear, with a C—C—N angle of 178.6 (5)°. The crystal packing is stabilized by intermolecular C—H⋯N interactions, through bifurcated acceptor hydrogen bonds formed between the carbonitrile N atom and two alternate C atoms in the unsubstituted benzene ring. The molecular structure and crystal packing are further stabilized by intramolecular and intermolecular C—H⋯π interactions
(E)-Methyl 2-[(2-formyl-6-methoxyphenoxy)methyl]-3-phenylacrylate
The title compound, C19H18O5, crystallizes with two independent molecules (A and B) in an asymmetric unit in both of which the two aromatic rings are in a bisectional orientation as evidenced by the dihedral angle between them [41.7 (1)° in molecule A and 35.6 (1)° in molecule B]. Both molecules adopt an E configuration with respect to the C=C bond. An intramolecular C—H⋯O hydrogen-bond occurs in molecule A. The crystal packing features intermolecular C—H⋯O interactions
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