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The number of structural and configurati...

The number of structural and configurational isomers of a bromo compound, `C_5H_9Br`, formed by the addition of `HBr` to 2-pentyne respectively, is:

A

1 and 2

B

2 and 4

C

4 and 2

D

2 and 1

Text Solution

Verified by Experts

The correct Answer is:
B
Addition of HBr to 2-pentyne gives two structural isomers (I) and (II)
`CH_3-CequivC-CH_2CH_3overset(HBr)rarrCH_3C(Br)underset((I))(=)CHCH_2CH_3+CH_3CHunderset((II))(=)C(Br)CH_2CH_3`
Each one of these will exist as a pair of geometrical isomers. Thus, there are two structural and four configurational isomers.
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  12. Which of the following is correct ?

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  13. Which of the following order is not correct?

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  14. Which of the following is an example of SN2 reaction?

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