Comparison of k_Ps values in pure pentene isomers and in abs. EtOH/cis-2-pentene/Pt, abs. EtOH/cis-2-pentene/Pt-on-charcoal and D₂O mixtures

Abstract
k_Ps values are an indication of o-Ps reactivity in molecular media via pseudo first order kinetics. Although pure pentene isomers exhibit similar o-Ps annihilation characteristics, cis-2-pentene shows rather unusual behavior when mixed with abs. EtOH and a heavy metal catalyst. In this study, comparison of k_Ps values in pure 1-pentene, trans-2-pentene and cis-2-pentene isomers with those for various abs. EtOH/pentene isomers/Pt, abs. EtOH/pentene isomer/Pt-on-charcoal and D₂O/Pd mixtures will serve to further characterize o-Ps behavior in molecular liquids. The k_Ps values will also be indirectly related to catalytic activity of Pt and Pt-on-charcoal.