• R. Jeevi Esther Rathnakumari
• C.Kavitha

A systematic study on the oxidative decarboxylation of a series of phenylsulfinylacetic acids (PSAAs) by hydrogen peroxide with three oxovanadium(IV)-salophen catalysts in the presence of ligand oxides in 100% acetonitrile medium is presented. The hydroperoxovanadium(V)-salophen generated from the reaction mixture is identified as the bonafide active oxidizing species. Introduction of electron donating groups (EDG) in the oxovanadium(IV)-salophen catalyst and electron withdrawing groups (EWG) in PSAA enhances the reactivity, whereas EWG in the catalyst and EDG in PSAA have a retarding effect on the reaction in the presence of ligand oxides. A Hammett correlation displays a non-linear downward curvature, which consists of two intersecting straight lines The importance of the ground state stabilization of PSAA is inferred from a linear Yukawa–Tsuno plot. Based on the observed substituent effects, a mechanism involving electrophilic attack of PSAA on the nucleophilic peroxo oxygen atom of the vanadium complex in the rate determining step followed by oxygen atom transfer is proposed.

oxovanadium(IV)-salophen, phenylsulfinylacetic acid, non-linear Hammett, oxidative decarboxylation, nitrogen base

"RESTRAINING ROLE OF LIGAND OXIDES AND RELATIVE REACTIVITY OF OXOVANADIUM(IV)-SALOPHEN COMPLEXES IN THE CATALYTIC OXIDATION OF PHENYLSULFINYLACETIC ACIDS BY HYDROGEN PEROXIDE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 4, page no.k508-k520, April-2024, Available :http://www.jetir.org/papers/JETIR2404A69.pdf

"RESTRAINING ROLE OF LIGAND OXIDES AND RELATIVE REACTIVITY OF OXOVANADIUM(IV)-SALOPHEN COMPLEXES IN THE CATALYTIC OXIDATION OF PHENYLSULFINYLACETIC ACIDS BY HYDROGEN PEROXIDE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 4, page no. ppk508-k520, April-2024, Available at : http://www.jetir.org/papers/JETIR2404A69.pdf