Hydrogenation of C_6H_5CHOHCOOH over Rh-Al_2O | vedclass

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Question

(B) The hydrogenation of $C_6H_5CHOHCOOH$ (mandelic acid) over a $Rh-Al_2O_3$ catalyst is a selective reaction that reduces the aromatic benzene ring

Vedclass · Accepted Answer

$C_6H_{11}CHOHCOOH$

Vedclass · Answer

(B) The hydrogenation of $C_6H_5CHOHCOOH$ (mandelic acid) over a $Rh-Al_2O_3$ catalyst is a selective reaction that reduces the aromatic benzene ring to a cyclohexane ring while leaving the carboxylic acid $(-COOH)$ and hydroxyl $(-OH)$ groups intact.The reaction is as follows:$C_6H_5CHOHCOOH + 3H_2 \xrightarrow{Rh-Al_2O_3} C_6H_{11}CHOHCOOH$Thus,the product formed is $C_6H_{11}CHOHCOOH$ (cyclohexylmandelic acid).

Hydrogenation of $C_6H_5CHOHCOOH$ over $Rh-Al_2O_3$ catalyst in methanol gives:

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