Question

Question: Draw the major product formed in each reaction.

a.

b.

c.

d.

Short answer

Answer

a.

b.

c.

d.

Step-by-step solution

Zaitsev rule

The reactions of an alkyl halide and an amine as starting materials give the product via the E₂ elimination.

When the alkyl halide is treated with the given base, it forms the more substituted alkene as the major product. The rule is known as the Zaitsev rule.

Hoffman elimination

Hoffmann elimination reaction gives the less substituted alkene as the major product when the amine is treated with the excess alkyl halide followed by the silver (II) oxide and heat.

Explanation

a. The reaction of the given amine is completed via the Zaitsev rule as:

More substituted product

b.The given amine gives the product alkene via the Hoffmann elimination process as:

E and Z products

c. The given amine gives the product alkene via the Zaitsev rule as:

More substituted product

d.The given amine gives the product alkene via the Hoffmann elimination process as:

Less substituted product