The title compound, [Fe(2)(C(16)H(14)N(2)S(3))(CO)(6)], was prepared as the biomimetic model for the active site of iron-only hydrogenase. The structure is similar to the diiron subsite of the iron-only hydrogenase active site, and contains a diiron-aza-dithiol-ate moiety in which a boat six-membered ring is fused with a chair six-membered ring. The substituted benzyl group attached to the bridging N atom resides in an equatorial position. The sum of the C-N-C angles around this N atom [331.9 (12)°] indicates sp(3) hybridization.