Well, 1,3 dihaloalkanes to 1,6 dihaloalkanes form corresponding cyclic compounds under the conditions of Wurtz Reaction. In fact, this is one of the general methods of preparation of cycloalkanes- cyclopropane , cyclobutane, etc.
Maybe 1,2 dihaloalkanes (2 moles would be required ) may undergo coupling to form cyclic compounds?
For example 2 moles of the compound in the first post might react under conditions of wurtz reaction to form cyclobutane?
" X-R-X + M → X-R• + M+X−
X-R• + M → X-R−M+
X-R−M+ + X-R-X → X-R-R-X + M+X−
So at first it'll form Cl-CH2-CH2-CH2-CH2-Cl -- (1)
And now we have a 1,4 dihaloalkane, which can form cyclobutane under the reaction conditions?
I think stoichiometric ratio will play a very important role too..
May be under limited conditions of the metal, the reaction will stop at (1) and that'll be the final product. But if more metal is present, it may react all the way upto the cycloalkane, after which no further reaction is feasible.