In practice this usually occurs; for example, on further bromination, a-bromonaphthalene yields a mixture of the (i.4) and (1.5) dibromonaphthalenes; and when nitronaphthalene is either brominated, or nitrated or sulphonated, the action is practically confined to the second ring.
A-Naphthylamine is prepared by reducing a-nitronaphthalene with iron and hydrochloric acid at about 70° C., the reaction mixture being neutralized with milk of lime, and the naphthylamine steam-distilled.
They are mostly distinguished by special trade names, and are mainly of two classes - those containing ammonium nitrate and nitrobenzene or nitronaphthalene, and those containing nitroglycerin and nitrocellulose, which are essentially weak dynamites.
A-Nitronaphthalene, C10H, N02, is formed by the direct nitration of naphthalene.
(3-Nitronaphthalene is prepared by acting with ethyl nitrite on an alcoholic solution of 2-nitro-a-naphthylamine in the presence of sulphuric acid (E.