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  4. The number of structural and configurational isomers of a brorno compound, C5 H9 Br, formed by the addition of HBr to 2-pentyne respectively, are

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Q. The number of structural and configurational isomers of a brorno compound, $C_5 H_9 Br,$ formed by the addition of $HBr$ to $2$-pentyne respectively, are

IIT JEEIIT JEE 1988Hydrocarbons

Solution:

$CH_3-C\equiv C-CH_2CH_3 + HBr \longrightarrow $
Therefore, two structural and four configurational isomers.

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