The primary products from palladium(II)-assisted nucleophilic addition
to 1.4-cyclohexadienes (eta(3)-cyclohexenylpalladium complexes) have
been investigated by NMR spectroscopy. The chloride-bridged dimers are
shown to interconvert rapidly between diastereomeric form with exchan
ge of monomeric units, The boat-chair equilibrium is too fast to be fr
ozen out even at - 130 degrees C, An anomalous cis addition product is
shown to be formed indirectly From the normal trans product.