5 research outputs found
(E)-1-(Furan-2-yl)-3-(2,4,5-trimethoxyphenyl)prop-2-en-1-one
In the title chalcone derivative, C16H16O5, the dihedral angle between the furan and benzene rings is 2.06 (17)°. The two methoxy groups at the ortho and para positions are essentially coplanar with the benzene ring [C—O—C—C angles = −1.0 (5) and 178.5 (3)°], whereas the third one at the meta position is slightly twisted [C—O—C—C = 9.6 (5)°]. In the crystal, weak C—H⋯O interactions link the molecules into a sheet parallel to (02). An intermolecular π–π interaction between the furan and benzene rings is present [centroid–centroid distance = 3.772 (2) Å]. A short C⋯C contact [3.173 (5) Å] is also observed between neighbouring furan rings
(E)-1-(4-Aminophenyl)-3-(pyridin-3-yl)prop-2-en-1-one
The title chalcone derivative, C14H12N2O, consists of 4-aminophenyl and pyridine rings bridged by a prop-2-en-1-one unit and exists in a trans configuration with respect to the C=C double bond. The molecule is slightly twisted with a dihedral angle of 29.38 (7)° between the benzene and pyridine rings. The prop-2-en-1-one bridge is nearly planar with an r.m.s. deviation of 0.0384 (1) Å and makes dihedral angles of 15.40 (9) and 16.30 (9)°, respectively, with the benzene and pyridine rings. In the crystal, molecules are linked by N—H⋯N and N—H⋯O hydrogen bonds into a layer parallel to the ab plane. A π–π interaction with a centroid–centroid distance of 3.6946 (10) Å is also observed
(E)-1-(2-Hydroxyphenyl)-3-(2,4,5-trimethoxyphenyl)prop-2-en-1-one
In the title chalcone derivative, C18H18O5, the dihedral angle between the hydroxy-substituted benzene ring and the trimethoxy-substituted benzene ring is 16.3 (1)°. The three methoxy groups are essentially coplanar with the benzene ring to which they are attached, with an r.m.s. deviation of 0.0208 Å. An intramolecular O—H...O hydrogen bond generates an S(6) ring motif. In the crystal, weak C—H...O interactions link molecules into helical chains along the b axis. These chains are connected into sheets parallel to the bc plane by further weak C—H...O interactions