A certain compound 'A' has a molecular formula `C_(5)H_(11)Br`. It reacts with Mg metal in anhydrous ether to form compound B which upon hydrolysis gives n-pentane when compound A was reacted with Zn metal in dry ether gave 4.5 dimethyl octane. What is A B and draw their structures?

Explanation

`CH_(3)-CH_(2)-CH_(2)-overset(CH_(3))overset(|)(CH)-Br`
(ii) `CH_(3)-CH_(2)-CH_(2)-underset(CH_(3))underset(|)(CH)-Mg-Br`