Reaction of [(Ph 3 P) 2 N][HRu 4 (CO) 1 2 BH] with [Cu(NCMe) 4 ][BF 4 ] in the presence of [(Ph 3 P) 2 N]Cl leads to [(Ph 3 P) 2 N][(HRu 4 (CO) 1 2 B) 2 Cu 4 (μ-Cl)]Cl, confirmed by a single crystal structure determination. A silver analogue is produced from the reactions of [(Ph 3 P) 2 N][HRu 4 (CO) 1 2 BH] with [Ag(NCMe) 4 ][BF 4 ] or AgBF 4 , but its formation competes with that of [(Ph 3 P) 2 N][(HRu 4 (CO) 1 2 BH) 2 Ag], the crystal structure of which has been determined.