Aquasoluble iron(III)-arylhydrazone-β-diketone complexes: Structure and catalytic activity for the peroxidative oxidation of C5–C8 cycloalkanes

Molecular iron complexes as catalysts for selective C–H bond oxygenation reactions

“…This also holds for the water-soluble iron(III) complexes of hydrazone ligands 48 and 49, which provide a coordination environment inspired by nonheme metalloenzymes. 124 An alteration of the catalytic performance of a series of symmetrically coordinated 8quinolinolato (50, Figure 9) complexes could be observed by visible light irradiation during catalytic oxidation reactions with H2O2 (Table 1). 125 This effect was particularly pronounced when dihalogenated ligands 50c-50e were used and it applies not only to aliphatic but also aromatic substrates.…”

Copper(II) Complexes of Arylhydrazone of 1H-Indene-1,3(2H)-dione as Catalysts for the Oxidation of Cyclohexane in Ionic Liquids

“…The catalytic performances of 1 are comparable in terms of yield with those obtained with aqua complexes of iron with arylhydrazone-β-diketone ligands, at room temperature, but using the higher catalyst loading of ca.1 × 10 −3 mol·L −1 , the 1:7.5 substrate/oxidant ratio and 6 h reaction, achieving TON values not higher than 290 [52]. With catalyst 1, a maximum TON value of 13 × 10 3 was attained using 1 × 10 −5 mol·L −1 of catalyst 1 and only the 1:2 substrate/oxidant ratio.…”

“…The ILs showed a better performance than the conventional solvent for the copper complex 1. No catalytic activity was observed for 2 in the presence of an IL.Despite the potential applications of arylhydrazone and their metal complexes, mainly in the oxidation of alkanes and alcohols [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53], the use of such compounds in catalysis is still an understudied area. In pursuit of our interest in the transition metal-catalysed peroxidative [by tert-butyl hydroperoxide (TBHP) or H 2 O 2 ] oxidation of hydrocarbons in ILs [36-39], we have tested a pair of already known [51] copper(II) complexes, viz.…”

Resonance‐Assisted Hydrogen Bonding as a Driving Force in Synthesis and a Synthon in the Design of Materials

“…[87,112,[261][262][263][264][265] In most cases, ligands with strong RAHB systemsh ave lower reactivity towards metal ions, [55] but in some cases am etal ion can directly deprotonate the ligand, destroying the RAHB system and enteringt he chelating pocket. [266,267] In mostc ases, however,f or RAHB-containing ligands to coordinate to metal ions, deprotonating agents have to be used. [266,267] In mostc ases, however,f or RAHB-containing ligands to coordinate to metal ions, deprotonating agents have to be used.…”