The reagent which does not give acid chloride | vedclass

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(B) $PCl_5$,$SOCl_2$,and $PCl_3$ are standard chlorinating agents used to convert carboxylic acids into acid chlorides $(RCOCl)$.$CH_3COOH + PCl_5 	o

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$Cl_2$

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(B) $PCl_5$,$SOCl_2$,and $PCl_3$ are standard chlorinating agents used to convert carboxylic acids into acid chlorides $(RCOCl)$.$CH_3COOH + PCl_5 	o CH_3COCl + POCl_3 + HCl$$CH_3COOH + SOCl_2 	o CH_3COCl + SO_2 + HCl$$3CH_3COOH + PCl_3 	o 3CH_3COCl + H_3PO_3$However,$Cl_2$ (chlorine gas) in the presence of red phosphorus (Hell-Volhard-Zelinsky reaction) reacts with carboxylic acids to substitute an $\alpha$-hydrogen atom,resulting in $\alpha$-chloro carboxylic acid,not an acid chloride.$CH_3COOH + Cl_2 \xrightarrow{	ext{Red } P} CH_2ClCOOH + HCl$

The reagent which does not give acid chloride on treating with a carboxylic acid is

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