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2-bromopentane with alcoholic KOH yields...

2-bromopentane with alcoholic KOH yields a mixture of three alkenes. Which of the following alkene is predominant?

A

1-pentene

B

Cis-pent-1-ene

C

Trans-pent-2-ene

D

Cis-pent-1-ene

Text Solution

Verified by Experts

The correct Answer is:
C
By Saytzeff's rule, substituted alkenes are more stable. Hence, out ot cis and trans forms, trans product is more stable.
`CH_(3)CH_(2)CH_(2)underset(Br)underset(|)CHCH_(3)overset(C_(2)H_(5)OK)rarr underset("(Minor)")(CH_(3)CH_(2)CH_(2)CH=CH_(2))+underset("(Major)")(CH_(3)CH_(2)CH=CHCH_(3))`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ALKYL HALIDE-PRACTICE EXERCISE (Exercise 2 (MISCELLANEOUS PROBLEMS))
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  2. The order of reactivities of the following alky halides for an S(N)2 r...

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  3. The reaction of ethyl bromide with silver cyanide results in the forma...

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  4. the order of reactivity of alkyl halides depends upon:

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  5. Which of the following is Wurtz-Fitting reaction?

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  6. 'A' is formed when benzene reacts with …………. In presence of AlCl(3)

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  7. In S(N)2 reactions, the correct order of reactivity for the following ...

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  8. Four compounds, Toluene (I), o-dichlorobenzene (II), m-dichlorobenzene...

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  9. 2-bromopentane with alcoholic KOH yields a mixture of three alkenes. W...

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  10. Compound (A) ,C(8)H(9)Br gives a white precipitate when warmed with a...

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  11. Among the following, the correct statement is

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  12. In the reaction, R-X overset("Alcoholic KCN") to A overset("Dil. HC...

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  13. If 1,3- dibromopropane reacts with zinc and NaI, the product obtained ...

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  14. Toluene is nitrated and the resulting product is reduced with tin and ...

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  15. Of the isomeric haexanes, the isomers that give the minimum and maximu...

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  16. (X) +KCN to CH(3)CN overset(2H(2)//Ni)(to) CH(3)CH(2)NH(2) What is (...

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  17. The following compound on hydrolysis in aqueous acetone will give ...

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  18. Match the following common name in Column I to the IUPAC name in Colum...

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  19. Which of the following statement(s) is/are false?

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  20. Identify the compound Y in the following reaction.

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