Bi- and tri-metallic {CpRhCl} fragments partnered with carborane monoanions [CB11H6Y6]− (Y = H, Br): control of nuclearity by choice of anion

Reaction of [Cp*RhCl2]2 (Cp* = pentamethylcyclopentadienyl) with Ag[closo‐CB11H12] affords the dinuclear salt [Cp*RhCl]2[CB11H12]2 (1), which in the solid state reveals a single carborane anion interacting with two {Cp*RhCl} fragments, via two BHRh interactions. With Ag[closo‐CB11H6Br6] the trimetallic complex [{Cp*Rh(µ2‐Cl)} 3(µ3‐Cl)][closo‐CB11H6Br6]2 (2) results. In the solid state, three metal fragments and four chloride ligands form seven‐corners of a cube, and the eighth vertex is completed by a cage CH unit hydrogen bonded to three bridging chloride ligands. Copyright © 2003 John Wiley & Sons, Ltd.