Crystal structure and Hirshfeld surface analysis of (2E,2'E)-1,1'-[seleno-bis-(4,1-phenyl-ene)]bis-[3-(4-chloro-phen-yl)prop-2-en-1-one].

In the title com-pound, C(30)H(20)Cl(2)O(2)Se, the C-Se-C angle is 99.0†(2)°, with the dihedral angle between the planes of the attached benzene rings being 79.1†(3)°. The average endocyclic angles (Se-C-C) facing the Se atom are 122.1†(5) and 122.2†(5)°. The Se atom is essentially coplanar with the attached benzene rings, deviating by 0.075†(1) and 0.091†(1)†à . In the two phenyl-ene(4-chloro-phen-yl)prop-2-en-1-one units, the benzene rings are inclined to each other by 44.6†(3) and 7.8†(3)°. In the crystal, the mol-ecules stack up the a axis, forming layers parallel to the ac plane. There are no significant classical inter-molecular inter-actions present. Hirshfeld surface analysis, two-dimensional fingerprint plots and the mol-ecular electrostatic potential surface were used to analyse the crystal packing. The Hirshfeld surface analysis suggests that the most significant contributions to the crystal packing are by C⋯H/H⋯C contacts (17.7%).