Which of the following alkanes can be synthesised in good yield by the Wurtz reaction?
A
$$CH_{3}CH_{2}-C(CH_{3})_{2}-CH_{2}CH_{3}$$
B
$$(CH_{3})_{2}CH-CH_{2}CH_{2}-CH(CH_{3})_{2}$$
C
$$(CH_{3})_{2}CH-CH_{2}-CH(CH_{3})_{2}$$
D
$$(CH_{3})_{3}C-CH_{2}-CH_{2}-CH_{3}$$
Correct option is B. $$(CH_{3})_{2}CH-CH_{2}CH_{2}-CH(CH_{3})_{2}$$
Dimers can be synthesized in good yield by the Wurtz reaction.
Of the given options, only $$(CH_{3})_{2}CH-CH_{2}CH_{2}-CH(CH_{3})_{2}$$ and $$CH_{3}CH_{2}-C(CH_{3})_{2}-CH_{2}CH_{3}$$ can be represented as dimers of $$(CH_{3})_{2}CH-CH_{2}-$$ and $$CH_{3}CH_{2}-C(CH_{3})-$$ respectively.
$$(CH_{3})_{2}CH-CH_{2}CH_{2}-CH(CH_{3})_{2}$$ is formed in a good yield than $$CH_{3}CH_{2}-C(CH_{3})_{2}-CH_{2}CH_{3}$$ because in the formation of the first compound there is less steric repulsion compared to that in second compound.
Hence, Option "B" is the correct answer.