The reactivity difference of major and minor π-allyl species was examined for two typed asymmetric allylic substitutions via linear symmetrical π-allyl and linear unsymmetrical π-allyl intermediates. 31P NMRobservation of the stoichiometric reaction of [Pd(1,3-diphenyl-π -allyl)(N-P-N-type ligand)]+ with malonate ion verified that major species was much more reactive than the minor one. In the case