The Potential of the Diarsene Complex [(C5H5)2Mo2(CO)4(µ,ƞ2-As2)] as a Connector Between Silver Ions

Chemistry : a European Journal
Manfred ScheerPavel A Shelyganov

Abstract

The reaction of the organometallic diarsene complex [Cp2Mo2(CO)4(µ,h2-As2)] (B) (Cp = C5H5) with Ag[FAl{OC(C6F5)(C6F10)}3] (Ag[FAl]) and Ag[Al{OC(CF3)3}4] (Ag[TEF]), respectively, yields three unprecedented supramolecular assemblies [(h2-B)4Ag2][FAl]2 (4), [(µ,h1:h2-B)3(h2-B)2Ag3][TEF]3 (5) and [(µ,h1:h2-B)4Ag3][TEF]3 (6). These products are only composed of the complexes B and Ag(I). Moreover, compounds 5 and 6 are the only supramolecular assemblies featuring B as a linking unit, and the first examples of [Ag(I)]3 units stabilized by organometallic bichelating ligands. According to DFT calculations, complex B coordinates to metal centers via both the As lone pair and the As-As σ-bond thus showing this unique feature of this diarsene Ligand.

References

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