Reactivity of the unsaturated dimolybdenum anion [Mo2(η5-C5H5)2(μ-PCy2)(μ-CO)2]− towards electrophiles based on p- and d-block elements

The title anion exhibits multisite reactivity when faced to electrophiles based on elements different from carbon, which can be incorporated either to the dimetal site, to give heterometallic clusters with Mo2M, Mo2Au2 and Mo4Hg cores, or to the oxygen atom of the bridging carbonyl ligands, this leading to rather unstable silyloxycarbyne and isocarbonyl-bridged derivatives.