Oligonuclear cyanide complexes from silver containing building blocks

The complexes LnM-CN-Ag-CN with LnM=Cp(dppe)Fe or Cp(PPh3)(2)Ru are availab le from [Ag(CN)(2)](-) and [LnM](+) or LnM-CN. They are precursors of [LnM- CN-Ag-NC-MLn](+). Likewise the trinuclear complexes [LnM'-CN-Ag-NC-M'L-n]() with LnM'=(TPA)Cu and cis-(bpy)(2)FeCN have been prepared. Irrespective o f the CN attachment in the starting materials the cyanide-bridged compounds always contain M-CN-Ag arrays, i.e. silver-isocyanide coordination, thereb y proving the lability of the silver-cyanide linkage. Electrochemical measu rements have shown that there is no electronic communication between the ou ter metal centers in the trinuclear complexes. (C) 2000 Elsevier Science B. V. All rights reserved.