Diiron propanedithiolate hexacarbonyl
Diiron propanedithiolate hexacarbonyl is the organoiron complex with the formula Fe26. It is a red diamagnetic solid. It adopts a symmetrical structure with six terminal CO ligands. The complex is a precursor to hydrogenase mimics.
It is prepared by the reaction of 1,3-propanedithiol with triiron dodecarbonyl:
In general, the CO ligands can be substituted by cyanide, phosphines, isocyanides, N-heterocyclic carbenes, and other donor ligands. Monosubstitution can be achieved through an in situ generation of the acetonitrile complex.
Upon irradiation of Fe26 with ultraviolet light, CO-photolysis occurs with the transient formation of the unsaturated species followed by the formation of the solvent adduct.
