An Improved Preparation of Polymer-Type η3-Allylpalladiumchlorides

Five polymer-type new compounds-(η³-cyclopentadienyl)palladiumchloride ( 6 ), (η³-indenyl) palladiumchloride ( 7 ), (η³-cycloheptatrienyl)palladiumchloride ( 8 ), (η³-phenalenyl)palladiumchloride ( 9 ) and (1,2,3-η³-4,5,6,7-η⁴-cyclopheptatrienyl)(palladium-chloride)(tricarboryl Iron) ( 10 ) have been prepared from the reaction of Na₂PdCl₄ with 1-trimethylsilylcyclopentadiene ( 1 ), 1-trimethylsilylindene ( 2 ), 1-trimethylsilyl cycloheptatriene ( 3 ), 1-trimethylsilylphenalene ( 4 ) and 1-trimethylsilylcycloheptatriene tricarbonyl Iron ( 5 ) respectively. All the complexes( 6 )-(10) are obtained in excellent yield using the improved preparation route. Furthermore, a reaction mechanism is proposed.