The Potential of the Diarsene Complex [(C H ) Mo (CO) (μ,η -As )] as a Connector Between Silver Ions.

The reaction of the organometallic diarsene complex [Cp Mo (CO) (μ,η -As )] (B) (Cp = C H ) with Ag[FAl{OC F (C F )} ] (Ag[FAl]) and Ag[Al{OC(CF ) } ] (Ag[TEF]), respectively, yields three unprecedented supramolecular assemblies [(η -B) Ag ][FAl] (4), [(μ,η :η -B) (η -B) Ag ][TEF] (5) and [(μ,η :η -B) Ag ][TEF] (6). These products are only composed of the complexes B and Ag . Moreover, compounds 5 and 6 are the only supramolecular assemblies featuring B as a linking unit, and the first examples of [Ag ] units stabilized by organometallic bichelating ligands. According to DFT calculations, complex B coordinates to metal centers through both the As lone pair and the As-As σ-bond thus showing this unique feature of this diarsene ligand.