Open AccessSTOPPED FLOW KINETICS AND MECHANISTIC STUDY OF PERIODATE DEGRADATION OF PERSIST CARCINOGENIC 2,6 XYLIDINE BY Mn(II) CATALYST
Author(s) -
Karuna Saini,
R.D. Kaushik,
Jaspal Singh
Publication year - 2022
Publication title -
rasayan journal of chemistry/rasayan journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 0976-0083
pISSN - 0974-1496
DOI - 10.31788/rjc.2022.1516822
Subject(s) - periodate , chemistry , catalysis , reaction rate constant , kinetics , stoichiometry , acetone , reaction rate , chemical kinetics , nuclear chemistry , medicinal chemistry , organic chemistry , physics , quantum mechanics
The periodate oxidation of 2,6 xylidine catalyzed by Mn(II) in a solution containing acetone miscible in water was studied using stopped-flow kinetics. The reaction was progressed at 450 nm. The influence of various parameters such as pH, dielectric constant on the reaction was also investigated. Furthermore, various thermodynamic parameters and the value of rate constants were monitored. Tests for quinone, melting point, UV spectra, and FTIR spectrum were used to characterize the final product as 2,6 -dimethyl-p-benzoquinone. Besides, the reaction rate remains unaffected by free radical scavengers. The reaction stoichiometry was reported as 1 mol 2,6-XYL: 2 mol NaIO4. The rate law, that is, d[C]/dt = kK3K4Kw[Mn(II)] [2,6-XYL]0 [IO4 - ]0 [H+ ] / {K2Kw + (Kw+KbK2) [H+ ] + Kb (H+ ) 2} confirms the findings under pseudo-first-order conditions. The 1/kcat versus [H+ ] profile further anticipated the rate law.