CHEMISTRY. 'i<J^ 



acid is not set free at once, but after several (lavs lerric cliloride ^ivcs 

 a reaction. The author proposiNs to continue his researches. {Lichkfs 

 Annalen, ccxxviii, 3U8.) 



The A^iilides of Orthophosphoric Acid (by A. Michaelis and n. von 

 So(]en). — By the action of oxycbloride of phospliorus on aniline, ortho- 

 phosphoric auilide, PO(NHC6H5) 3, is obtained in small crystals, sobi- 

 ble in boiling alcohol and melting at 2080C. On treating this with 

 bromine it yields orthophosphoricbexabromanilide, PO(NHC6H3Br2)3, 

 also a ciystallized body melting at 252° to 2r)30(J. 



Dianilidoorthophosphoric acid, PO. OH(]SrH('6Hr,)2, is obtained by 

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

 l)Owder insoluble in cold water, and decomi)Oscd by hot water into ani- 

 line and phosphoric 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. 

 {Liehigh Annalen, ccxxix, 334.) 



Chemical Constitution of Tsatin (by II. Kolbe). — Isatiii oxidized by 

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

 bon dioxide aucl 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 acid with bases in the cold evolved carbon dioxide, so salts could 

 not be formed. Ammonia solution gives ammonium carbonate and 

 orthoamidobenzamide. Anilin acts similarly. Con(!entrated nitric acid 

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

 heated with hydrochloric acid or water gives a strong acid resembling 

 metanitroorthoamidobeuzoic. Reduction of the nitro-acid with tin and 

 hydrochloric acid gives the hydrochloride of adiamido-benzoic acid. 

 Sul[)huric acid gives the sulphate. Treatment of isatoic acid with ni- 

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

 formula C4H4NCO — COH gives the best explanation of the above facts. 

 (F. P. v., frcm Journal f. pralct. Chem., xxx, 467.) 



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

 Victor Meyer). — In 1883 Victor Meyer proi)osed the following constitu- 

 tional formula lor thiophene: 



In the present arti(;le the authors refute some objections ui-ged 

 against this formula and present new reasons for maintaining it. (J5er. 

 d. ahem. Oes., xvii], 3005). 



