ALLYLPALLADIUM(II) COMPLEXES DERIVED FROM 1,2,6-HEPTATRIENE AND 1,2,8-NONATRIENE

Article abstract of DOI:10.1016/0022-328X(84)85083-4

The reaction of 1,2,6-heptatriene with PdCl2(PhCN)2 gives a mixture of di-μ-chlorodi<1-(but-3-en-1-yl)-2-chloroallyl>di-palladium(II) and di-μ-chloro-di(η³-2-methylene-3-chlorocyclohexyl)dipalladium(II) which could not be separated by conventional techniques.The structures of these compounds are ascertained from a study of the 1H and 13C NMR spectra and chemical properties of the mixture.A mechanism is proposed to account for the formation of the cyclic η³-2-methylene-3-chlorocyclohexyl ligand.A corresponding reaction of 1,2,8-nonatriene with PdCl2(PhCN)2gives di-μ-chlorodi<1-(hex-5-en-1-yl)-2-chloroallyl>dipalladium(II) as the sole product.