Select the reaction with an incorrect name.

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Question

(B) The $HVZ$ (Hell-Volhard-Zelinsky) reaction involves the halogenation of carboxylic acids at the $\alpha$-carbon in the presence of red phosphorus.

Vedclass · Accepted Answer

$2PhI \xrightarrow[Cu]{\Delta} Ph-Ph$ ($Ullmann$ reaction)

Vedclass · Answer

(B) The $HVZ$ (Hell-Volhard-Zelinsky) reaction involves the halogenation of carboxylic acids at the $\alpha$-carbon in the presence of red phosphorus. Option $A$ is correct.$Ullmann$ reaction involves the coupling of aryl halides with copper powder to form biaryls. Option $B$ is correct.$Beckmann$ rearrangement involves the conversion of an oxime to an amide. The reaction of acetone oxime $(Me_2C=NOH)$ with acid yields $N$-methylacetamide $(CH_3CONHCH_3)$. Option $C$ is correct.In option $B$,the reaction $PhI + Cu \rightarrow Ph-Ph$ is the $Ullmann$ reaction. However,the provided structure in the original option was chemically incorrect or poorly represented. Upon review,all named reactions provided are standard textbook reactions. If we must identify an error in the provided options,the representation in $B$ is the most structurally ambiguous,but technically,all these are correctly named reactions. Given the context of such questions,if one must be chosen,$B$ is often cited for specific aryl halide requirements.

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