NEET
- Exam
- NEET
- Subject
- Chemistry
- Chapter
- Haloalkanes and Haloarenes
NEET · Chemistry · Haloalkanes and Haloarenes
Consider the following reaction Which of the following statements...
Consider the following reaction
Which of the following statements are correct ? a. I is the major product of the reaction b. II is the major product of the reaction c. Formation of I is in accordance with Saytzeff's rule d. II is more stable because it is more substituted
Which of the following statements are correct ? a. I is the major product of the reaction b. II is the major product of the reaction c. Formation of I is in accordance with Saytzeff's rule d. II is more stable because it is more substituted
Options
- Aa,c
- Bb,c
- Ca,d
- Db,d
Correct answer
D. b,d
Step-by-step solution
- The reaction shown is a dehydrohalogenation of 2-bromobutane using alcoholic KOH. This is an elimination () reaction.
- According to Saytzeff's rule, in an elimination reaction, the major product is the most substituted (most stable) alkene.
- Product I is 1-butene, which is a monosubstituted alkene.
- Product II is 2-butene, which is a disubstituted alkene.
- Since II (2-butene) is more substituted than I (1-butene), it is also more stable and is therefore the major product.
- Statement a is incorrect because I is the minor product.
- Statement b is correct because II is the major product.
- Statement c is incorrect because the formation of the major product, II, is in accordance with Saytzeff's rule, not the formation of I.
- Statement d is correct because II is a more substituted alkene, which makes it more stable.
The correct statements are (\mathrm{b}) and (\mathrm{d}).