Alkynes are hydrocarbons with carbon-carbon triple bonds in them. The simplest alkyne can be prepared by the process shown in Reaction 1.
Also consider the following reactions.
Quinoline is a heterocyclic amine.
Lindlar's catalyst is often used for the reduction of alkynes to alkenes. The catalyst consists of palladium which is deposited in a finely divided state of barium sulfate, which is subsequently treated with a heterocyclic amine called quinoline. Which of the following is the most likely function of quinoline?
|A||To speed up the reaction so that the alkyne is completely converted to its most reduced form of hydrocarbon|
|B||To slow down the reaction, because the function of a catalyst is to slow down the reaction|
|C||To moderate the catalytic activity to facilitate a restrictive reduction|
|D|| It acts as an oxidizing agent so that the alkyne is reduced.|