Reaction of [[Fe.sub.2][(CO).sub.8](mu-C[F.sub.2])] with As[Me.sub.3] and other Lewis bases: Synthesis, crystal structures of [[Fe(CO)6[(AsMe3).sup.2](mu-C[F.sub.2])] and [[Fe(CO)5[(ASMe3).sub.3](mu-C[F.sub.2])], and theoretical considerations

The X-ray analyses shows that the difluorcarbene complex [[Fe.sub.2][(CO).sub.8](mu-C[F.sub.2])] reacts with As[Me.sub.3] under CO substitution to give the [mu]-C[F.sub.2] containing complexes [[Fe.sub.2][(CO).sub.6][(AsMe3).sub.2](mu-C[F.sub.2)] and [[Fe.sub.2][(CO).sub.5][(AsMe3).sub.3](mu-C[F.sub.2])] which have an [[Fe.sub.2][(CO).sub.9].sup.-] like structure. The AIM analysis of the complexes indicates that there is no direct [sigma]-bonding interaction between the two iron atoms inside the dinuclear complexes which support the leading rule of the CO and C[F.sub.2] bridges in keeping the dinuclear integrity found from MO analysis in similar compounds.