Abstract
About the Formation of trans‐Epoxides in the Liquid Phase Oxidation of cis/trans‐n‐Alkenes Catalyzed by TechnetiumThe liquid‐phase oxidation of n‐oct‐1‐ene, cis‐oct‐4‐ene and cis/trans mixtures of oct‐4‐ene with molecular oxygen in the presence of the technetium complexes 1 to 10 was studied. Low epoxide yields (≦10%) are characteristic features of the reactions. Pure cis‐oct‐4‐ene and mixtures of cis/trans‐oct‐4‐ene yields in cis/trans‐epoxide ratios lower than 0.05. Isomerization reactions and nucleophilic epoxide ring opening reactions are not responsible for the low epoxide yield and the favoured formation of trans‐epoxide. Epoxide decomposition by a Tc‐catalyzed radical reaction which prefers the cis‐epoxide is discussed.
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