Question

Oct-1-yne (HCCCH₂CH₂CH₂CH₂CH₂CH₃) reacts rapidly with NaH, forming a gas that bubbles out of the reaction mixture, as one product. Oct-1-yne also reacts rapidly with CH₃MgBr , and a different gas is produced. Write balanced equations for both reactions and identify the gases formed.

Short answer

Answer

The balanced equations formed from the provided reagents along with the gases released are shown below:

Methane is liberated from this reaction.

Step-by-step solution

Step-by-Step Solution Step 1: Function of NaH

NaH is a strong base that abstracts a proton from the alkynes to form an acetylide anion and also generates hydrogen.

Function of Grignard reagent

A Grignard reagent acts both as a base and a nucleophile. In the mentioned reaction, it acts as a base because acidic hydrogen is present from sp-hybridized carbon.

Representation of the detailed mechanism of the reaction with CH₃MgBr

Balanced equations

Hence, the balanced equations formed from the provided reagents along with the gases released are shown below: