(E)-1-(4-Decyl-oxyphen-yl)-3-(2-hy-droxy-phen-yl)prop-2-en-1-one.

In the title compound, C(25)H(32)O(3), the enone group adopts an s-cis conformation. The alk-oxy chain is in an all-trans conformation. The dihedral angle between the benzene rings is 7.

(E)-1-(3-Hy-droxy-phen-yl)-3-[4-(tetra-dec-yl-oxy)phen-yl]prop-2-en-1-one.

In the title compound, C(29)H(40)O(3), the enone moiety adopts an s-cis conformation. The dihedral angle between the benzene rings is 4.33 (5)° The least-squares mean line through the tetra-decyl side chain forms a dihedral angle of 83.

(E)-1-[4-(Hex-yloxy)phen-yl]-3-(2-hy-droxy-phen-yl)prop-2-en-1-one.

In the title compound, C(21)H(24)O(3), the enone moiety adopts an s-cis conformation and the dihedral angle between the benzene rings is 12.89 (6)°. The hex-yloxy tail adopts an extended conformation.

(E)-1-[4-(Hex-yloxy)phen-yl]-3-(3-hy-droxy-phen-yl)prop-2-en-1-one.

There are two mol-ecules in the asymmetric unit of the title compound, C(21)H(24)O(3), in which the dihedral angles between the aromatic rings are 6.4 (1) and 7.0 (1)°.

(E)-1-[4-(Hex-yloxy)phen-yl]-3-(4-hy-droxy-phen-yl)prop-2-en-1-one.

In the title compound, C(21)H(24)O(3), inter-molecular O-H⋯O and C-H⋯O inter-actions form bifurcated acceptor bonds, generating R(2) (1)(6) ring motifs. These ring motifs link the mol-ecules into extended chains along [010]. The crystal structure is further stabilized by C-H⋯π inter-actions.

(E)-3-[4-(Dodec-yloxy)phen-yl]-1-(2-hydroxy-phen-yl)prop-2-en-1-one.

In the title compound, C(27)H(36)O(3), the asymmetric unit consists of two crystallographically independent mol-ecules. The aromatic rings form dihedral angles of 17.1 (2) and 17.

(E)-3-[4-(Hex-yloxy)phen-yl]-1-(2-hydroxy-phen-yl)prop-2-en-1-one.

In the title compound, C(21)H(24)O(3), the conformation of the enone group is s-cis. The benzene rings are inclined at an angle of 7.9 (1)°.

(E)-1-(4-Decyl-oxyphen-yl)-3-(4-hydroxy-phen-yl)prop-2-en-1-one.

In the title compound, C(25)H(32)O(3), the asymmetric unit contains two crystallographically independent mol-ecules: both enone groups adopt an s-cis configuration. In the crystal, O-H⋯O and C-H⋯O inter-molecular inter-actions form bifurcated hydrogen bonds, which generate R(1) (2)(6) ring motifs. These inter-molecular inter-actions link the mol-ecules into one-dimensional chains along the [10] direction.

(E)-3-(4-Hexyl-oxyphen-yl)-1-(3-hydroxy-phen-yl)prop-2-en-one.

In the title compound, C(21)H(24)O(3), the enone unit is in the s-cis configuration. The dihedral angle between the benzene rings is 2.18 (4)°.