An alkyl bromide (A) forms Grignard reagent which on treatment with water, yields n-hexane. (A) On treatment with sodium forms 4,5-diethyloctane. (A) is:
The Grignard reagent is a strong base and is easily protonated to form alkane.
Alkyl bromide(A) undergoes a Wurtz reaction to give symmetrical alkane,4,5-diethyloctane.