Question

Question: Draw the products formed when hex-1-yne is treated with each reagent.

Short answer

Answer

Step-by-step solution

Step-by-Step Solution Step 1: Reactions of Alkynes

The main reactions of alkynes include addition reactions across the triple bond to form alkene or alkane.

Examples of types of addition reactions shown by alkynes are hydrogenation, halogenation, hydrohalogenation, and hydration.

Halogenation and hydrohalogenation reaction of hex-1-yne

The addition of hydrogen halide takes place in accordance with Markovnikov’s rule.

The halogenation reaction of alkyne produces tetra haloalkane.

The reaction of alkyne with hydrogen halide and halogens

Reaction of hex-1-yne with acid and boranes

Alkynes do not readily react with acid, but in the presence of mercury sulfate as a Lewis acid, they undergo an addition reaction.

The alkyne undergoes hydroboration reaction and oxidation in the presence of peroxide and hydroxide.

The keto form is more stable; therefore, tautomerism takes place.

The reaction of alkyne with acid and boranes

Nucleophilic addition reaction with hex-1-yne

The reduction of alkynes to trans alkenes takes place in the presence of sodium metal and liquid ammonia.

Alkynes react with an epoxide to giv an additional product:

The nucleophilic reaction of hex-1-yne