In the structure of the title chalcone, C17H14O2, derived from cinnamaldehyde, the olefine group has a trans configuration. The mol­ecular conformation is stabilized by an intra­molecular O—H⋯O hydrogen-bond inter­action with graph-set motif S(6).

https://journals.iucr.org/e/issues/2011/09/00/bx2361/bx2361.pdf

(2E,4E)-1-(2-Hy-droxy-phen-yl)-5-phenyl-penta-2,4-dien-1-one.

In the title compound, C17H13NO3, the dihedral angle between the benzene rings is 31.21 (5)°. In the crystal, inversion dimers linked by pairs of C—H⋯O hydrogen bonds occur. A C—H⋯π inter­action is also indicated.

https://journals.iucr.org/e/issues/2012/01/00/tk5031/tk5031.pdf

(1E,4E)-1-(3-Nitro­phen­yl)-5-phenyl­penta-1,4-dien-3-one

In the title compound, C21H22ClNO3, the penta-diene unit is nearly planar [maximum deviation = 0.023 (1) A], but the carbonyl O atom deviates significantly [by 0.304 (1) A] from its mean plane, which is twisted with respect to the phenyl and chloro-benzene rings by 71.34 (13) and 46.40 (13)°, respectively. In the crystal, inversion-related molecules are linked by two pairs of O-H⋯O hydrogen bonds, forming chains propagating along [01-1], enclosing R (2) 2(16) and R (2) 2(22) ring motifs. The chains are linked via C-H⋯O hydrogen bonds and C-H⋯π inter-actions into a three-dimensional supra-molecular architecture.

https://journals.iucr.org/e/issues/2015/11/00/xu5877/xu5877.pdf

Crystal structure of (2E,4E)-5-[bis-(2-hy-droxy-eth-yl)amino]-1-(4-chloro-phen-yl)-5-phenyl-penta-2,4-dien-1-one.

In the crystal structure of the title compound, C18H16O2, the mol­ecules related by a c-glide plane are linked into a column running along the c axis by a weak inter­molecular C—H⋯O hydrogen bond.

Yu-Zhi Rong

Papers

1-(4-Methoxyphenyl)-5-phenylpenta-2,4-dien-1-one