4,5-Diferrocenyl-1,2-di-thiole-3-thione.

The structure of 4,5-diferrocenyl-1,2-di-thiole-3-thione, [Fe 2 (C 5 H 5 ) 2 (C 13 H 8 S 3 )] or C 23 H 18 Fe 2 S 3 , at 130 K has monoclinic ( P 2 1 / c ) symmetry. The molecule has two ferrocenyl units attached to a 1,2-di-thiole-3-thione moiety. It is of inter-est with respect to the question if the introduction of ferrocenyl substituents into biologically active mol-ecules offers the potential to obtain more efficacious therapeutic drugs. The crystal structure displays inter-molecular contacts of the C-H⋯S and S-π(C-C) types.