The First Palladium Carbene Cluster: Synthesis and Structure

The first palladium carbene cluster, μ 2 -tetrakis(diphenylmethylidene)-μ 2 -tetraacetato- quadro -tetrapalladiurn(4 Pd – Pd ) Pd 4 ( μ -CPh 2 ) 4 ( μ -OAc) 4 , has been obtained by substitution of diphenylcarbene ligands for CO groups in μ 2 -tetrakis(carbonyl)- μ 2 -tetraacetato- quadro -tetrapalladium(4 Pd – Pd ) Pd 4 ( μ -CO) 4 ( μ -OAc) 4 ; the cluster is also the first palladium complex containing carbene ligands of the Schrock type.