A 12-Vertex Metallacarborane of Silver(I).

The discovery of ferrocene in 1951 was a significant landmark in the field of organometallic chemistry, and since then, numerous sandwich- or half-sandwich metallic complexes have been reported. However, silver stands as an intriguing exception in this regard, and knowledge of its bonding situation has remained undisclosed. Herein, unprecedented 12-vertex metallacarboranes of Ag(I) ( and ) were synthesized through the reaction of sodium hexamethyldisilazide (NaHMDS) with the mixture of -CB carborane anion-supported -heterocyclic carbene precursors ( and ) and [Ag(PPh)Cl].