Chlorination of 1, 5-dichloronaphthalene is known to give a 1, 1, 2, 3, 4, 5-hexachlorotetralin and a pentachlorodihydronaphthalene, now established to be 1, 2, 3, 4, 8-pentachloro-1, 2- dihydronaphthalene from uv and 1H nmr evidence, and from the fact that, when dehydrochlorinated, it gives 1, 2, 3, 5-tetrachloronaphthalene. The structure of the hexachlorotetralin has also been established from its 1H nmr spectrum and that of its ...
