Bromination of an alkene

Thread starter morgan8222
Start date Mar 15, 2012
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Alkene

In summary, the purpose of bromination of an alkene is to add a bromine atom to the double bond, creating a new carbon-bromine bond. The mechanism involves initiation, propagation, and termination steps. Factors such as concentration, temperature, and other substances can influence the rate of the reaction. Bromination and chlorination of an alkene differ in the products formed due to the reactivity of bromine and chlorine. Some applications of bromination include the production of organic compounds, flame retardants, and laboratory experiments.

Mar 15, 2012

morgan8222

I am asked for the "actual products" of reacting Br(2) with:

trans-1,2-diphenylethene
and
cis-1,2-diphenylethene

I know their structures. And I know that each Br will attach to each side of the double bond. Are there three products for each? ...with the products being isomers?

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Mar 16, 2012

Borek

Mentor

See mechanism section of the http://en.wikipedia.org/wiki/Halogen_addition_reaction

What is the purpose of bromination of an alkene?

The purpose of bromination of an alkene is to add a bromine atom to the double bond of the alkene, creating a new carbon-bromine bond. This reaction is used to synthesize various organic compounds and is an important step in the production of many commercial products.

What is the mechanism of bromination of an alkene?

The mechanism of bromination of an alkene involves three steps: initiation, propagation, and termination. In the initiation step, a bromine molecule is split into two bromine atoms by UV light. In the propagation step, one of the bromine atoms attacks the alkene double bond, forming a bromonium ion. This ion is then attacked by a bromide ion, resulting in the formation of the product with a carbon-bromine bond. In the termination step, two bromine radicals combine to form a stable molecule.

What factors influence the rate of bromination of an alkene?

The rate of bromination of an alkene is affected by several factors, including the concentration of the reactants, temperature, and the presence of other substances. Higher concentrations of reactants and higher temperatures generally lead to a faster reaction. The presence of substances that can act as catalysts or inhibitors can also affect the rate of the reaction.

What is the difference between bromination and chlorination of an alkene?

Bromination and chlorination of an alkene are similar reactions, but they differ in the products formed. Bromine is more reactive than chlorine, so it tends to add to the alkene more quickly and selectively. This leads to the formation of a single product in most cases. Chlorination, on the other hand, is less selective and can result in the formation of multiple products.

What are some applications of bromination of an alkene?

Bromination of an alkene has various applications in organic synthesis. It is used to produce compounds such as bromoalkanes, which are used as intermediates in the production of plastics, pharmaceuticals, and other industrial products. It is also used in the production of flame retardants, pesticides, and other chemicals. Additionally, the bromination reaction is often used in laboratory experiments to demonstrate the principles of organic chemistry.