Chemical origin of high activity in oxygenation of cyclohexane by H2O2 catalysed by dinuclear iron(III) complexes with amide-containing ligands

Hydrogen peroxide oxidation of aromatic hydrocarbons by immobilized iron(III)

“…The clustered copper ions are inactive in oxidation reaction but accelerate the decomposition of hydrogen peroxide. In a similar manner to reported studies [10], in the presence of H 2 O 2 an adduct seems to be formed which may be an Al 2 O 3 -Fe(III)-η 1 -hydroperoxide species stabilized by hydrogen bonding between the hydroperoxide ion and the oxygen atom of the alumina. Thus, supported iron(III) shows high activity for oxygenation of benzene with hydrogen peroxide without decomposing it.…”

Single step conversion of benzene to phenol using hydrogen peroxide over modified V2O5–Al2O3 systems

“…Although no detailed mechanistic studies have been carried out in the present work, it is tentatively suggested that a heterolytic cleavage of hydrogen peroxide, proceeding via the formation of metallo peroxide is adopted in the present system. Similar observations have been noticed in literature over metal oxide dispersed analogues [3,28].…”

Model Reactions for the Formation of Iron Deposition

“…The K[Fe(ida) 2 ]3H 2 O complex is green in the crystalline state, but its color changed to orange when it dissolved in the buffer solution. The orange color thus found is frequently observed for the iron(III) species with -oxo bridged dimeric Fe(III) cores (Ito et al, 1996), and this color is very similar to that of K 4 [Fe 2 O(ida) 4 ]10H 2 O, its -oxo bridged dimeric core being confirmed by the crystal structure determination (Mizuno et al, 2006, and see Figure 3). These are implying that the -oxo Figure 6), and in the next step the formation of di--oxo bridged dimeric Fe(III) complex may occur through the attack by the iron(III) atom of the another iron(III) chelate.…”