Question

In which reactions product, formation takes place according to Hofmann's rule?
I.

II.

• A. Only I
• B. Both I and II
• C. Only II
• D. None of the above

Answer 1

The correct option is A Only I

The elimination reaction of a substrate with a sterically unhindered/​less bulky base​ generally gives the most stable alkene which is more substituted, i.e. normal Saytzeff product, but sterically hindered bulky base leads to a terminal or less substituted alkene, i.e. Hofmann product.
Bulky base $(t-Bu{O}^{-}{K}^{+})$ is present in I thus it will give Hofmann product while $\left(C{H}_{3}C{H}_2{O}^{-}{K}^{+}\right)$ is sterically unhindered base so it will give a Saytzeff product. Hence correct option is (a).