CHEMISTRY. 'iO 



Q 



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HvAd is not set free at once', but after sev^eral days rorric cliloride gives 

 ■a reaction. The author proposes to continue his researches. {LicbU/s 

 Annalen, coxxviii, 308.) 



The Anilides of Orthophosphoric Acirl (by A. Mi{;baeli« and H. von 

 Sodeii). — By the action of oxychloride of phos[)liorn8 on aniline, ortho- 

 phosphoric amlide,"PO(NITC6H5) 3, is obtained in small crystals, solu- 

 ble in boiling alcohol and melting- at 208°C. On treating- this with 

 bromine it yields orthophosphorichexabromauilide, rO(NHC6H3Br2):,, 

 also a (uystallized body melting at -!o2o to 23;P(J. 



Dianilidoortliophosphoric acid, PO. OH(NHCfiU.^)2, is obtained by 

 treating- the corresponding chloride with soda lye; it forms a white 

 powder insoluble in cold water, and decomposed by hot water into ani- 

 line and i)hosphoric acid. This decomposition is more quickly effected 

 by acids. The acid melts at 196° to 197°, becoming brown. Its silver 

 salt forms a white precipitate, soluble in nitric acid and in ammonia. 

 {Liebigh Annalen, ccxxix, 334.) 



Chemical Constitittion of Isatin (by H. Kolbe). — Isatin oxidized by 

 chromic acid yields isatoic acid. This, heated with water, yields car- 

 bon dioxide and orthoamidobenzoic acid. With hydrochloric acid the 

 chloride is formed. Sulphuric and nitric acids act similarly. Dis- 

 solved in alcohol and acted upon by hydrochloric-acid gas, ethyl ortho- 

 amidobenzoic hydrochloride is formed, which is decomposed by water. 

 Isatoic aciu with bases in the cold evolved carbon dioxide, so salts could 

 not be formed. Ammonia solution gives ammonium carbonate and 

 orthoamidobenzamide. Anilin acts similarly. Concentrated nitric acid 

 gives nitroisatoic acid, which is more stable than nitric acid. This 

 heated with hydrochloric acid or water gives a strong acid resembling 

 metanitroorthoamidobenzoic. Eeduction of the nitro-acid with tin and 

 hydrochloric acid gives the hydrochloride of a-diamido-benzoic acid. 

 Sulphuric acid gives the sulphate. Treatment of isatoic acid with ni- 

 trous acid gives a-nitrosalicylic acid. The author concludes that the 

 formula C4H4XCO— COH gives the best explanation of the above facts. 

 (F. P. v., fn.m Journal f pralt. Chem., xxx, 467.) 



The Constitution of Thiophene (by L. Gattermaun, A. Kaiser, and 

 Victor Meyer). — In 1883 Victor Meyer j)! oposed the following constitu- 

 tional formula for thio])hene: 



H H 

 C C 



^ X 



HC CH 



s 



In the present article the authors refute some objections urged 

 against this formula and present new reasons for maintaining it. {Be^\ 

 d. chem. Ges., xviii, 3005). 



