Question

2-fluorobutane is subjected to elimination with $C{H}_3{O}^{-}/C{H}_{3}COC{H}_3$. The products formed are

• A. Cis-but-2-ene
• B. Trans-but-2-ene
• C. But-1-ene
• D. All of the above

Answer 1

The correct option is D All of the above

Here, $C{H}_3{O}^{-}$ is a small size base which undergoes elimination reaction when reacts with 2-fluorobutane.

2-fluoro butane gives but-l-ene as well as but -2-ene (cis and trans). But major product is but-l-ene by $E2$ mechanism due to the poor leaving ability of $F$ group.