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Oxidation of chromone-3-carboxaldehyde (CCA) and substituted analogues by H,O, has been carried out in aqueous acid (HCI and H,SO, 1 and micellar media. Reaction kinetics indicated order in ICCAl as well as [H,O,I to be unity while it is a fraction ( I > n > 0) in [acid]. Reaction rates were found to be faster in the solvents of low-dielectric constant I D ) Added salt (KCI or ( N H , ), SO,) increased the rate of oxidation marginally On the basis of observed linearity of Amis plot and marginal positive salt effect, protonated CCA (en01 form of CCA, a cation) and H,O, [neutral molecule] were considered as reactive species in the rate limiting step Reaction rates were found to be enhanced significantly in anionic and nonionic micellar isodium dodecylsulfate (SDSI and Triton X-100 (Tx]

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