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Q.
How many alkyl bromides would yield isopentane on reaction with Grignard reagent followed by treatment with water?
Hydrocarbons
Solution:
All alkyl bromides having carbon skeleton of isopentane (2-methylbutane $\left(CH_{3}\right)_{2}CHCH_{2}CH_{3}$) will give isopentane via Grignard reagent.