(*) chromium trioxide.
These compounds are produced by the peroxide cleavage of an Evans oxazolidinone. These compounds are alpha-brominated in the presence of catalytic phosphorus tribromide in the Hell-Volhard-Zelinsky reaction, and like alcohols, they can be chlorinated by addition of thionyl chloride. These compounds can be produced from primary alcohols with the addition of sulfuric acid and (*) chromium trioxide. The second simplest example of these compounds has a water-free "glacial" form. One of these compounds is reacted with an alcohol in the Fischer esterification. For 10 points, name these compounds which possess a COOH group, whose "acetic" variety is present in vinegar.
These compounds are produced by the peroxide cleavage of an Evans oxazolidinone.
carboxylic acids [prompt on "COOH" before mention, prompt on "acid"]