SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF [PD-4(MU(3)-CH)(MU-CL)(3)(PBU(3)(T))(4)] - A TETRAHEDRAL PALLADIUM CLUSTER-WITH A MU(3)-METHYLIDYNE LIGAND

The compound [Pd-4(mu(3)-CH)(mu-Cl)(3)(PBu(3)(t))(4)] has been synthesised from [Pd-2(dba)(3)] (dba = dibenzylideneacetone), PBu(3)(t) and CHCl3 and characterised spectroscopically and by single-crystal X-ray analysis; it undergoes substitution reactions with Br- and tertiary phosphines and is a catalyst for the polymerisation of ethyne.