US EPA

4457818 

Journal Article 

Ethylenediaminetetraacetic acid catalyzed oxidative conversion of N-(2-hydroxyethyl)phthalimide to n-methylphthalimide by cerium(IV) in aqueous sulphuric acid Medium : A kinetic and mechanistic approach 

Meti, MD; Pendari, MZ; Rayabag, SA; Naik, NS; Banimath, MB; Nandibewoor, ST; Chimatadar, SA 

2017 

Yes 

Journal of the Indian Chemical Society
ISSN: 0019-4522 

94 

2 

141-149 

WOS:000399627900003 

The reaction between cerium(IV) and N-(2-hydroxyethyl)phthalimicle (NHEP) is very slow in sulphuric acid medium at 25 degrees C. However, the reaction is facile in presence of ethylenediamminetetraacetic acid (EDTA). aqueous. sulphuric acid medium. The reaction between cerium(IV) and NHEP in presence of EDTA exhibits 1 : 1 (oxidant : reductant) stoichiometry. The products are identified as cerium(III)-EDTA complex, n-methylphthalimide and formaldehyde. The order with respect to oxidant concentration is unity, whereas the order with respect to both substrate and catalyst concentration is less than unity. Increase in sulphuric acid concentration increases the rate of reaction. The order with respect to H+ ion Concentration is less than unity. The added product cerium(III), did not have any significant effect on the rate of reaction in presence of EDTA. The active species, of oxidant is identified as CeSO42+. Based on the experimental results a suitable mechanism is proposed. The activation parameters and thermodynamic quantities are also determined and discussed. 

Cerium(IV); oxidation; N-(2-hydroxyethyl)phthalimide; EDTA catalyst; thermodynamic parameters