87183-81-1Relevant articles and documents
Direct synthesis of pentaphenylcyclopentadienyl complexes of palladium
Powell, John,Dowling, Norman I.
, p. 1742 - 1748 (2008/10/08)
A series of pentaphenylcyclopentadienyl complexes of palladium(II) of the type (η5-C5Ph5)(η3-all)Pd (all = allyl, 2-chloroallyl, 2-methylallyl, 1-methylallyl, 1,1-dimethylallyl, 1-carbomethoxyallyl) have been prepared in high yield from the reaction of NaC5Ph5 with [(η3-all)PdCl]2 in THF. Reaction of (η5-C5Ph5)(η3-all)Pd with phosphorus donor ligands results in the formation of zerovalent palladium complexes and coupled organic products. Reaction of (η5-C5Ph5)(η 3-2-chloroallyl)Pd with PR3 ligands gives a series of complexes (η5-C5Ph5)PdCl(PR3) that are not synthetically accessible from the reaction of NaC5Ph5 with [PdCl2(PR3)]2. Pyrolysis of (η5-C5Ph5)(2-chloroallyl)Pd gives allene and the chloro-bridged dimer [(η5-C5Ph5)PdCl]2. Reduction of this dimer by activated zinc dust in the presence of RC≡CR′ or CO gives the palladium(I) dimers (η5-C5Ph5) 2(μ-RC≡CR′)Pd2 and (η5-C5Ph5)2(μ-CO) 2Pd2, respectively.