Oxidation of Polyphenol Trihydroxybenzene Using Environment Friendly Catalyst Copper (II) Complex of 4-Methoxyphenyl Benzopyran

TLDR: In this article, the copper (II) complex of 4-methoxyphenyl benzopyran has been synthesized using microwave irradiation and characterized by different tools such as IR, electronic spectroscopy, elemental analysis, thermal analysis, and ESR analysis.

Abstract: The copper (II) complex of 4-methoxyphenyl benzopyran has been synthesized using microwave irradiation and characterized by different tools such as IR, electronic spectroscopy, elemental analysis, thermal analysis, and ESR spectroscopy. The mode of metal binding shows that the copper binds with the ligand through the nitrogen atoms of the amino and cyanide groups. The copper complex (Cu L (AC)2.2H2O) has been used in the homogenous oxidation of polyphenol 1,2,3-trihydroxybenzene in presence of H2O2 as a green oxidant to produce a first-order rate constant kcat = 3.45× 10 -3 s -1 and dissociation constant K' = 32.0 mM. The catalysis shows 1.4× 10 3 times rate enhancement in terms of the first-order rate constant compared to the uncatalyzed reaction under the same reaction conditions. The oxidation