Bronco-binitronaplethali n. (C, H, Br ( NO, A crystalline body formed on dissolving bibromonaphthalin in nitric acid.
Trinitronaphthatin ( N Nitronaphthatise. This com pound occurs wider three isomeric modifications. It is obtained on boiling naphthalin for some days in nitric acid. It is colourless, and crystallises in irregular tables or prisms. Alkalies colour it red.
The final product of the prolonged action of nitric acid upon naph thalin is a mixture of oxalic and phthalic acids, thus :— Phthalic acid Naphthalic acid. Alizaric arid. In addition to the method just mentioned, this acid results from the long-continued action of nitric acid upon bichloride of naphthalin, alizarin, or purpurin. [MADDER, COLOURING IVIATTERS or.] It may be obtained in the pure state by repeated crystallisation from water, and then forms lamellar groups. It is very soluble in alcohol or ether. By distillation with lime it is converted into carbonic acid and BENZOLE, and when heated alone it sublimes iu beautiful elastic needles of plethalic anhydride called also anhydrous phthalic acid, and pyroalizaric acid. It is a bibasic acid, and forms neutral and acid phthalates.
Trichlorophthalic acid chlorophthalisic acid is produced by the action of nitric acid upon sexchlornaphtbalin.
Nitroplethalic acid may be obtained in yellowish rhomboidal crystals by evaporation of the mother liquors from the preparation of the nitronaphthalins. It is bibasic, and forms crystalline salts. By sublimation it is reduced to the anhydrous condition.
PAtAslanaie acid, or napkthalanside pAtilataeside (C„11 N0,), results from the action of ammonia upon anhydrous phthalic acid.
PAtnalimide, or Naphthalintide (C,,II,N0,1, eublinaes in thin plates when acid phthalate of ammonia is heated. It is colourless, almost in•
soluble in water, but readily soluble in boiling alcohol or ether.
fAtnylpAthalemide, or phthalamile (C„H,NO ,), is produced by the action of aniline upon ammonia. Ph enylphthalamic acid , or ph Malan ilie acid, contains „N Os= C,,,II,(C,,HONO,).
Chlorine and Bromine deriratices of No pAthelia.
These are extremely numerous, and are of two kinds. First, those which are simply naphthaline (C,,,H,), in which an atom or atoms of hydrogen are replaced by equal quantities of chlorine or of bromine. The following is a list of them :— Paranaplithalin, or an(hracin / This polymeride of naph• thalin seem/rallies the latter body toward, the end of the process of distilling coal tar. It •ie insoluble in alcohol ; any naphtlinlin is there fore easily dissolved out by that liquid. It is a white solid; meltim point 356' Fehr. At • temperature above 572', it boils, sublimes, MP' condenses In lamellar crystals. Turpentine readily dissolves it. Chip vine converts It Into ehloranthaan, a crystalline body containing C 11„C1,. A corresponding nitric derivative, C,,,11,„(NO,),, aim dlelanaphallalia, or retltderin, in another polymeride of naphthalin obtained during the distillation of rosin. Its melting•point is 153' Fehr., boiling point 617'. It in crystalline, slightly soluble in col( alcohol, but readily so when heated ; It is also sobible in ether, naphtha and turpentine.
.YerAskyta nine (c,,,,i r?.; = N C,.11,)). Xapletlea !idine. Obtained by the reduction of nitronaphthalin, either with sectie acid and metallic iron, or with sulphide of ammonium.