`underset("Bromomethane")(CH_(3)Br) overset(N/A,ether)underset("(Wurttz reaction )")(to) underset("Ethane")(CH_(3)-CH_(3)) overset(Br_(2).hv)underset("(BromiN/Ation)")(to) underset("Bromoethane")(CH_(3)CH_(2)-Br) overset(N/A,ether)underset("(Wurtz reaction )")(to) underset("Butane (C)")(CH_(3)CH_(2) -CH_(2)CH_(3))`