Functional model oxygenations by nonheme iron complexes - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 190

was used for the oxygenation of cyclohexane and adamantane under in
as solvent without addition of reducing reagent or radical
initiators. 256 Alcohols and ketones were obtained catalytically by the radical-chain
path. High turnover numbers were achieved in the selective epoxidation of alkenes
with 1 atm in 1,2-dichloroethane/acetonitrile at 356 K. 257 Cyclooctene was
converted to cyclooctene oxide (98%) under 82% converstion and 10000 TON
(Table 3). Addition of 4- tert -butylcatechol as an alkyl radical inhibitor did not
affect the reaction. IR spectra using and indicated the Fe=O band.

4.3.2 Oxygenation by Iron Species in the Heterogeneous System
(L = TPA) was applied to the reaction in the
heterogeneous system. 258 The complex was embedded in an amorphous silicate
surface modified by a combination of hydrophilic poly(ethylene oxide) and
hydrophobic poly(propylene oxide). This assembly showed reactivity somewhat
higher in comparison to an aqueous micelle system utilizing a surfactant.
Functionalization of alkane and alkene in the biphasic catalytic system was
performed in the different way by using perfluoroheptane-soluble catalysts. 259
Immobilization of iron(III) on to the polymer matrix of cross-linked styrene-
divinylbenzene matrix resulted in the epoxidation of cis -cyclooctene and styrene in
the presence of TBHP. 260
Likewise, oxygenation of cyclohexane was performed by dinuclear iron
complexes and in hexagonal
mesoporous solid (HPTB = N , N,N' , N' -tetrakis(2-benzimidazolylmethy)-2-hydroxy-
1,3-diaminopropane, HPTP = N , N,N',N' -tetrakis(2-pyridylmethy)-2-hydroxy-l,3-
diaminopropane) in the presence of TBHP or

261

Oxygenations of methane

and benzene are thought to proceed by the reaction with that is formed on

loading. 262,263 FeZSM-5 by the