Boride cluster fusion through copper and silver. Crystal structure of [(Ph3P)2N][(HRu4(CO)12BH)2Ag]

Reaction of [(Ph3P)2N][HRu4(CO)12BH] with [Cu(NCMe)4][BF4] in the presence of [(Ph3P)2N]Cl leads to [(Ph3P)2N][(HRu4(CO)12B)2Cu4(μ-Cl)]Cl, confirmed by a single crystal structure determination. A silver analogue is produced from the reactions of [(Ph3P)2N][HRu4(CO)12BH] with [Ag(NCMe)4][BF4] or AgBF4, but its formation competes with that of [(Ph3P)2N][(HRu4(CO)12BH)2Ag], the crystal structure of which has been determined.