Identify the reagent 'R' used in the followin | vedclass

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(B) The given reaction is the Rosenmund reduction, where an acid chloride is reduced to an aldehyde using hydrogen gas in the presence of a poisoned p

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$H_2, Pd - BaSO_4$

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(B) The given reaction is the Rosenmund reduction, where an acid chloride is reduced to an aldehyde using hydrogen gas in the presence of a poisoned palladium catalyst. Step $1$: The reagent used is $H_2$ gas in the presence of $Pd$ supported on $BaSO_4$. Step $2$: $BaSO_4$ acts as a poison to prevent the further reduction of the aldehyde to an alcohol. Step $3$: The reaction is $C_6H_5COCl + H_2 \xrightarrow{Pd/BaSO_4} C_6H_5CHO + HCl$.

Identify the reagent '$R$' used in the following reaction: $C_6H_5COCl \xrightarrow{R} C_6H_5CHO + HCl$

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