Question

How would you prepare the following compounds, starting with cyclopentene and any other reagents needed? (f) 1,3-Cyclopentadiene.

Short answer

1,3-Cyclopentadiene can be formed in the following way:

Step-by-step solution

Bromination

It means substitution of one hydrogen from the reactant, so that bromine atom can be added there.

Alkyl halide

Alkyl halides are also known as haloalkanes or halogenoalkanes. They contains one or more halogen substituents i.e. –Br, -Cl,-I,-F.

Preparation of cyclopentanol

The desired product 1,3-cyclopentadiene can be prepared by bromination of cyclopantene, 3-bromocyclopantene is formed, which is then debrominated to form the desired product.

The reaction is as follows:

Bromination of 3-bromocyclopantene

Preparation of 1,3-cyclobutadiene