Question

Which of the following statements about regioselectivity of elimination reactions is not correct?

• A. More substituted and more stable alkenes are formed preferentially by both $E1$ and $E2$ mechanisms.
• B. substrates with a poorer nucleophile tend to give the less substituted alkenes.
• C. Sterically hindered, bulky bases give the less substituted alkenes.
• D. Reactions by the $E1$ mechanism are generally less regioselective than those by the $E2$ mechanism.

Answer 1

The correct option is D Reactions by the $E1$ mechanism are generally less regioselective than those by the $E2$ mechanism.

E1 reactions are regioselective and form two products depending on the position of double bond and base they form major and minor products. The major product is called the saytzef product, a more substituted alkene and the minor product is Hofmann product it is less substituted alkene as shown in given example.