Carbonyl halides of the Group VIII transition metals. VI. Compounds of palladium(I)

Abstract

The carbonyl halides Pd(CO)Cl and Pd(CO)Br have been prepared by the action of carbon monoxide on palladium(II) halides in aqueous hydrohalic acid solution. In addition, the caesium salts CsPd(CO)Cl₂ and CsPd(CO)Br₂, and the rubidium salt RbPd(CO)Cl₂, were also isolated. The corresponding iodo complexes could not be prepared.     By direct interaction of the carbonyl halides with bis(diphenylarsino)methane (dam) the compounds [Pd(dam)X]₂ (X = Cl, Br) were prepared. The formulation of all these complexes as compounds of palladium(I) was confirmed on the basis of various physical measurements.