[Fe {SeC H -2,4,6-Ph } {N(SiMe ) } ] and [Fe {SeC H -2,4,6-Ph } ], the First Three-Coordinate Selenolatoiron Complexes.

In a controlled manner, half or all the bis(trimethylsilyl)amido ligands of 1 can be replaced by selenolato ligands, resulting in the first selenolatoiron complexes 2 and 3 with three-coordinate iron centers. They are stabilized by secondary metal-framework bonds (here metal-carbon) and could, since they are coordinatively unsaturated, possibly serve as model compounds of the FeMo cofactor of nitrogenases.