NEET > Chemistry Class 11 > Hydrocarbons: Directing Groups
Hydrocarbons: Directing Groups Video Lecture - Chemistry Class 11 - NEET
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FAQs on Hydrocarbons: Directing Groups Video Lecture - Chemistry Class 11 - NEET
| 1. What are directing groups in hydrocarbons? |  |
Ans. Directing groups in hydrocarbons are functional groups or substituents that influence the regioselectivity of a reaction. They direct the incoming reagent to a specific position on the hydrocarbon molecule.
| 2. How do directing groups affect the regioselectivity of a reaction? | |
Ans. Directing groups affect the regioselectivity of a reaction by influencing the electron density distribution in the hydrocarbon molecule. They can either activate or deactivate specific positions, making them more or less reactive towards the incoming reagent.
| 3. Can you provide examples of common directing groups in hydrocarbons? | |
Ans. Some common directing groups in hydrocarbons include -OH (hydroxyl), -NH2 (amino), -COOH (carboxyl), -CHO (aldehyde), -C(O)R (ketone), -CN (cyano), and -NR2 (dialkylamino).
| 4. How do directing groups influence the regioselectivity in electrophilic aromatic substitution reactions? | |
Ans. In electrophilic aromatic substitution reactions, directing groups activate specific positions on the aromatic ring, making them more susceptible to electrophilic attack. They can either activate ortho and para positions (ortho-para directors) or meta positions (meta directors) based on their electron-donating or electron-withdrawing nature.
| 5. Are there any exceptions to the regioselectivity rules imposed by directing groups? | |
Ans. Yes, there are exceptions to the regioselectivity rules imposed by directing groups. Factors such as steric hindrance and neighboring groups can sometimes override the directing effect of a group and lead to unexpected regioselectivity in a reaction. Additionally, certain reactions may not follow the usual regioselectivity patterns due to specific reaction conditions or other factors.
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