Question

The major product obtained on treatment of $C{H}_{3}C{H}_{2}CH\left(F\right)C{H}_3$ with $C{H}_3{O}^{-}/C{H}_{3}OH$ is:

• A. $C{H}_{3}C{H}_{2}CH\left(OC{H}_3\right)C{H}_3$
• B. $C{H}_{3}CH=CHC{H}_3$
• C. $C{H}_{3}C{H}_{2}CH=C{H}_2$
• D. $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}OC{H}_3$

Answer 1

The correct option is B $C{H}_{3}CH=CHC{H}_3$

The major product obtained on treatment of $C{H}_{3}C{H}_{2}CH\left(F\right)C{H}_3$ with $C{H}_3{O}^{-}/C{H}_{3}OH$ is $C{H}_{3}CH=CHC{H}_3$ which is saytzeff product.
Note:
Hoffman product is the less substituted alkene and saytzeff product is more substituted alkene.
In most cases, saytzeff product is the major product.
Hoffman product is obtained when the sterically hindered base is used during dehydrohalogenation.