Employment of different spectroscopic tools for the investigation of chromium(VI) oxidation of acetaldehyde in aqueous micellar medium

Abstract

Different spectroscopic methods have been applied to investigate the chromic acid oxidation of acetaldehyde in aqueous media, catalysed by surfactants. Three representative heteroaromatic nitrogen base promoters, 2-picolinic acid (PA), 2,2'-bipyridine (bpy) and 1,10-phenanthroline (phen), have been associated along with surfactants as promoters to the kinetic study. Comparative studies of unpromoted and promoted reactions invoked that 2,2'-bipyridine produced maximum rate enhancement. The mechanism of the reaction path has been proposed with the help of kinetic results and spectroscopic studies. The observed net enhancement of rate effects has been explained with scientific manipulations and data obtained. The combination of TX-100 and1,10-phenanthroline is found to be most effective for acetaldehyde oxidation.

A Review of some catalysts and promoters used in organic transformations

“…[142] Bpy was found very much efficient promoter in oxidation of butanal by bivalent copper and chromium(VI) oxidation of acetaldehyde. [143,144] There are many more examples of such promoted reactions with great diversity of oxidants and reductants.…”

Insights into the micellar catalysed efficient oxidation of 2- and 3-pentanol by cerium(iv) in a greener medium of SDS and STS

“…6,7 In our recent works, we have investigated the catalytic efficacy of single micelle and mixed micelle in the oxidation of several organic substrates at different micellar compositions along with their physiochemical properties using different techniques including conductivity, dynamic light scattering (DLS), and spectrofluorimetry. 8,9 There have been various studies on the oxidation of alcohols using various transition metal oxidants such as Cu(III), 10 Ag(III), 11 Cr(VI), 12,13 V(V), 14 and Mn(VII). 15 In this research, we considered two isomeric alcohols (2-pentanol and 3-pentanol), which differ in symmetry, i.e., 2-pentanol is chiral and 3-pentanol is achiral, to explore the micellar catalysed organic transition.…”

A promising mixed micellar approach to tune the oxidation of isoprenol by diperiodatoargentate(iii) in aqueous media

“…17 By virtue of numerous beneficial aspects and following the direction of nature, our group have long been utilizing aqueous surfactant solution to perform organic reactions, especially single step oxidative transformation in water media. 18,19 In order to produce crucial organic molecules through a simple oxidation process, transition metals of higher oxidation states (like Cr(VI), [20][21][22] V(V), 23,24 Ce(IV), 25 and Cu(III) 26 ) are the best choice as oxidizing agents over long periods. In our recent work, we have studied the oxidizing potential of Cu(III) following the kinetics of 1-propanol and 1,3-propanediol oxidation using mixed micellar media comprised of Triton X-100 and cetylpyridinium chloride (CPC).…”