ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 30, Number 6
JKCSEZ 30(6)
December 20, 1986 

This study is related to reactivity of dioxygen bridged palladium complexes having π-allyl ligands. In this case, new dioxygen bridged palladium complexes were prepared using superoxide ion(O2-) as an oxygen source. Reactions of the dioxygen palladium complexes prepared in the study were examined in order to clarify the nature of the coordinated dioxygen. Treatments of a solution of the dioxygen bridged palladium complexes in benzene by water, methanol and acetic acid gave hydrogen peroxide (H2O2) as hydroxy-, methoxy-, and acetoxybridged palladium complexes, respectively. The dioxygen bridged palladium complexes reacted also with substitution phenols of salicylaldehyde, 8-hydroxyquinoline and active methylenes of acetylacetone, dimethyl malonate to afford mononuclear complexes of palladium and hydrogen peroxide. The results suggest that dioxygen is coordinated as peroxo (O22-) in the complexes and behaves as a strong base.