Better Students Ask More Questions.
What does "controlled oxidation" of alcohols (to produce aldehydes/ketones) really...
1 Answer | add yours
Best answer as selected by question asker.
Primary alcohols upon mild oxidation produce carbonyl compounds. Alcohols upon strong oxidation, proceed one step further to produce carboxylic acids. Milder oxidizing agents include Ag/O2, Pyridinium chlorochromate (PCC), or MnO2. Stronger oxidizing agents are KMnO4, H2CrO4, Jones’ reagent (CrO3 in H2SO4) or PCC + H5IO6. Such controlled oxidation is, however, a relative concept. Thus Jones’ reagent converts primary alcohols to carboxylic acids, while secondary alcohols end up in the ketone (carbonyl) stage. For similar type of alcohols, such distinction is obvious. Thus PCC converts a primary alcohol into an aldehyde, but when coupled with a strong oxidising agent like H5IO6, produces the corresponding carboxylic acid. Stronger oxidizing agents like H2CrO4 or K2Cr2O7 can not be 'controlled' and almost always end up with the carboxylic acid as the final product.
Posted by llltkl on April 27, 2013 at 5:43 AM (Answer #1)
1 Reply | Hide Replies ▲
Join to answer this question
Join a community of thousands of dedicated teachers and students.