magnesium; 1,4-dihalogenonaphthalene in tetrahydrofuran the aromatic halogeno-compd. was added to the soln. of Mg and trimethylchloro-compd., refluxed for several d; hydrolysed with dild. HCl, extd. with ether, dried over Na2SO4, the solvent evapd., the product recrystd. from methanol; elem. anal.;

in tetrahydrofuran chromy., distn., elem. anal.;