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Pentene-1 with HCl gives
- a)3-Chloropentane
- b)2-Chloropentane
- c)1, 2-Dichloropentane
- d)1-Chloropentane
Correct answer is option 'B'. Can you explain this answer?
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Pentene-1 with HCl givesa)3-Chloropentaneb)2-Chloropentanec)1, 2-Dichl...
Reaction of Pentene-1 with HCl
When pentene-1 is treated with hydrochloric acid (HCl), an electrophilic addition reaction occurs.
Formation of the carbocation
The first step involves the formation of a carbocation intermediate. The pi bond of the alkene is attacked by the positively charged hydrogen of HCl. This results in the formation of a carbocation at the secondary carbon.
Addition of Chloride ion
The next step involves the addition of chloride ion to the carbocation. This results in the formation of a new bond between the carbon and the chloride ion. The chloride ion is negatively charged and acts as a nucleophile.
Regioselectivity
The regioselectivity of the reaction depends on the stability of the carbocation intermediate. The more stable the carbocation, the more likely it is to form. In this case, the carbocation formed at the secondary carbon is more stable than the one formed at the primary carbon. Therefore, the reaction is regioselective and the major product is 2-chloropentane.
Answer: Option B - 2-Chloropentane
When pentene-1 is treated with hydrochloric acid (HCl), an electrophilic addition reaction occurs.
Formation of the carbocation
The first step involves the formation of a carbocation intermediate. The pi bond of the alkene is attacked by the positively charged hydrogen of HCl. This results in the formation of a carbocation at the secondary carbon.
Addition of Chloride ion
The next step involves the addition of chloride ion to the carbocation. This results in the formation of a new bond between the carbon and the chloride ion. The chloride ion is negatively charged and acts as a nucleophile.
Regioselectivity
The regioselectivity of the reaction depends on the stability of the carbocation intermediate. The more stable the carbocation, the more likely it is to form. In this case, the carbocation formed at the secondary carbon is more stable than the one formed at the primary carbon. Therefore, the reaction is regioselective and the major product is 2-chloropentane.
Answer: Option B - 2-Chloropentane
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Pentene-1 with HCl givesa)3-Chloropentaneb)2-Chloropentanec)1, 2-Dichloropentaned)1-ChloropentaneCorrect answer is option 'B'. Can you explain this answer?
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Pentene-1 with HCl givesa)3-Chloropentaneb)2-Chloropentanec)1, 2-Dichloropentaned)1-ChloropentaneCorrect answer is option 'B'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Pentene-1 with HCl givesa)3-Chloropentaneb)2-Chloropentanec)1, 2-Dichloropentaned)1-ChloropentaneCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Pentene-1 with HCl givesa)3-Chloropentaneb)2-Chloropentanec)1, 2-Dichloropentaned)1-ChloropentaneCorrect answer is option 'B'. Can you explain this answer?.
Pentene-1 with HCl givesa)3-Chloropentaneb)2-Chloropentanec)1, 2-Dichloropentaned)1-ChloropentaneCorrect answer is option 'B'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Pentene-1 with HCl givesa)3-Chloropentaneb)2-Chloropentanec)1, 2-Dichloropentaned)1-ChloropentaneCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Pentene-1 with HCl givesa)3-Chloropentaneb)2-Chloropentanec)1, 2-Dichloropentaned)1-ChloropentaneCorrect answer is option 'B'. Can you explain this answer?.
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