Which of the following reagents is used to co | vedclass

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(B) The reduction of an alkyne to a $Cis$-alkene is achieved by catalytic hydrogenation using Lindlar's catalyst.Lindlar's catalyst consists of pallad

Vedclass · Accepted Answer

$Pd-C / 	ext{quinoline}$

Vedclass · Answer

(B) The reduction of an alkyne to a $Cis$-alkene is achieved by catalytic hydrogenation using Lindlar's catalyst.Lindlar's catalyst consists of palladium deposited on calcium carbonate $(Pd-CaCO_3)$ or barium sulfate $(Pd-BaSO_4)$,which is partially poisoned with quinoline or lead acetate.This specific reagent prevents the complete hydrogenation of the alkyne to an alkane and stereoselectively yields the $Cis$ isomer.Therefore,the correct reagent is $Pd-C / 	ext{quinoline}$ (often referred to as Lindlar's catalyst).

Which of the following reagents is used to convert a $C \equiv C$ triple bond to a $C=C$ double bond to give the $Cis$ isomer of an alkene?

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