Radical Bromination: The Primary Alkane Reaction (Theory & Practice)

The video tutorial covers the importance of radicals in organic chemistry, focusing on radical bromination. It explains the selectivity of bromination over chlorination, highlighting the preference for tertiary positions. The tutorial also discusses the use of NBS for brominating alkenes and aromatic compounds. Through examples, it demonstrates the practical applications of radical bromination in synthesis.

Why are alkanes considered unreactive in organic chemistry?

• They have no functional groups.

• They contain double bonds.

• They are highly electronegative.

• They are always in a gaseous state.

What is the main advantage of using bromine over chlorine in radical halogenation?

• Bromine is less expensive.

• Bromine is more selective.

• Bromine reacts faster.

• Bromine is less toxic.

What is the role of N-bromo succinimide (NBS) in bromination reactions?

• It acts as a solvent.

• It provides a source of bromine.

• It stabilizes the reaction.

• It acts as a catalyst.

In radical bromination, which carbon position is preferentially brominated?

• Primary

• Secondary

• Tertiary

• Quaternary

When using NBS for bromination, where does the bromine atom typically attach?

• On the carbon adjacent to the double bond

• Directly on the double bond

• On the carbon with the least hydrogen atoms

• On the carbon farthest from the double bond

What is the main reason for using NBS in bromination of alkenes?

• To increase reaction speed

• To enhance product solubility

• To prevent addition reactions

• To reduce reaction temperature

In the context of radical reactions, what does 'allylic' refer to?

• A carbon atom with a single hydrogen

• A carbon atom with no hydrogen atoms

• A carbon atom directly bonded to a benzene ring

• A carbon atom adjacent to a double bond

Why is radical bromination preferred over radical chlorination?

• Bromination is faster.

• Bromination is less hazardous.

• Bromination is more selective.

• Bromination is cheaper.

What is the effect of using light in radical bromination reactions?

• It acts as a catalyst.

• It slows down the reaction.

• It initiates the formation of radicals.

• It changes the color of the solution.

Which position is not brominated when using NBS on a benzene ring?

• Secondary position

• Quaternary position

• Primary position

• Allylic position