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Q. The compound which is NOT formed when a mixture of $n$-butyl bromide and ethyl bromide treated with sodium metal in presence of dry ether is

MHT CETMHT CET 2016

Solution:

When a mixture of $n$ -butyl bromide and ethyl bromide is treated with sodium metal in the presence of dry ether, then ethane cannot be formed because reaction follows Wurtz-Fittig reaction. It is a type of coupling reaction.

$CH _{3} CH _{2} CH _{2} CH _{2} Br + CH _{3} CH _{2} Br +2 Na \ce{ ->[{Dry}][{ether}] }$

$\underset{\text{Octane}}{C _{4} H _{9}- C _{4}} H _{9}+ \underset{\text{Hexane}}{C _{4} H _{9}- C _{2}} H _{5}+ \underset{\text{Butane}}{C _{2} H _{5}- C _{2}} H _{5}$