Rf. Parton et al., IRON-PHTHALOCYANINE IMMOBILIZED ON ACTIVATED CARBON-BLACK - A SELECTIVE CATALYST FOR ALKANE OXIDATION, Journal of catalysis, 164(2), 1996, pp. 341-346
Carbon black is tested as a support for iron-phthalocyanine within the
frame of the oxidation of hydrocarbons with t-butyl-hydroperoxide as
oxygen donor. The increased hydrophobicity of the carrier surface, wit
h respect to zeolite Y, changes the adsorption behavior of the compone
nts in the reaction mixture towards the alkane. A major improvement in
the oxidation conversion and efficiency of cyclohexane has been estab
lished, Furthermore, the kinetic isotope effect and the reactivity ord
er of secondary and tertiary carbon atoms measured with adamantane pro
vide evidence for an ''oxygen rebound'' reaction mechanism, a non-free
-radical oxidation pathway where the metallo-complex is responsible fo
r the hydrogen abstraction. (C) 1996 Academic Press, Inc.