The first reported example of a rearrangement reaction produced an alpha-hydroxy-substituted one of these compounds from benzil under basic conditions, a reaction that also occurs in other non-enolizable 1,2 di-ketones. Phosphorus tribromide is used as a catalyst in the Hell–Volhard–Zelinsky halogenation of these compounds. These compounds can be reacted with thionyl (“THY-oh-nile”) chloride to produce a compound, which, when added to a primary amine, makes a secondary (*) amide. Adding water to an acyl chloride produces one of these compounds (10[1])and hydrogen chloride. These compounds’ anhydrides, form (10[1])two of these compounds on hydrolysis. With Jones reagent, these compounds can be formed by fully oxidising primary alcohols. (10[1])For 10 points, name these organic compounds which feature a ‘C·O·O·H’ functional group. ■END■