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NEET CHEMISTRYAlcohols, Phenols and EthersEasy

Question

The major product formed in the dehydrohalogenation reaction of 2-bromopentane is pent-2-ene. This product formation is based on:

A

Hofmann Rule

B

Huckel's Rule

C

Saytzeff's Rule

D

Hund's Rule

Step-by-Step Solution

In the dehydrohalogenation of alkyl halides, if there is a possibility of formation of more than one alkene due to the availability of more than one β\beta-hydrogen atom, the major product is usually the more highly substituted alkene. This is in accordance with Saytzeff's rule (also known as Zaitsev's rule), which states that the preferred product is the alkene which has the greater number of alkyl groups attached to the doubly bonded carbon atoms . Consequently, the dehydrohalogenation of 2-bromopentane yields pent-2-ene as the major product (81%) and pent-1-ene as the minor product (19%) .

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Alcohols, Phenols and Ethers. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAlcohols, Phenols and Ethersproductformeddehydrohalogenationreactionbromopentane

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