Syntheses and structures of some complexes containing M 3 (μ-dppm) 3 moieties (M=Cu, Ag) linking C 4 {M′L x } groups [M′L x =Re(CO) 3 (Bu t 2 -bpy), Ru(dppe)Cp ∗ ]

Several complexes containing diyndiyl-MLn [MLn=Ru(dppe)Cp∗, Re(CO)3(But2-bpy)] fragments bridged by M3(dppm)3 clusters (M=Cu, Ag) have been obtained from HC4[MLn] and [M2(dppm)2(NCMe)x]2+ (x=3,4) and structurally characterised. Electrochemical and DFT studies have shown that the MLn groups interact with each other through the M3(dppm)3 cluster.