Crystal structure of (E)-3-allyl-2-sulfanyl-idene-5-[(thio-phen-2-yl)methyl-idene]thia-zolidin-4-one.

Mol-ecules of the title compound, C11H9NOS3, are built up by one thio-phene and one 2-thioxa-thia-zolidin-4-one ring which are connected by a methyl-ene bridge. In addition, there is an allyl substituent attached to nitro-gen. The two rings are almost coplanar, making a dihedral angle between them of 0.76 (11)°. The allyl group is oriented perpendicular to the mean plane through both ring systems. The crystal structure exhibits inversion dimers in which mol-ecules are linked by pairs of C-H⋯O hydrogen bonds. Additional π-π inter-actions between neighboring thio-phene and 2-thioxa-thia-zolidin-4-one rings [inter-centroid distance = 3.694 (2) Å] lead to the formation of a three-dimensional network.