RvAN AND C'uLi.iNANK — Some Derivatives of StUhene. 161 



means of a mechanical stirrer, and the temperature rose gradually, the nitro- 

 compound going gradually into solution. A yellow precipitate was deposited, 

 becoming more dense as the reaction jirogressed. When it had become very 

 dense the reaction was stopped, and the product was allowed to cool, tlie 

 deposit was separated from the mother-liquor by filtration, and was then 

 decomposed with hot water. The red powder tlius obtained was dissolved 

 in acetone, and on evaporation of the cold solvent bright-red prisms, melting 

 at 184° C, resulted. 



The following results were obtained on analysis : — ■ 



O'lo02 gram substance gave 1T7 c.c. moist nitrogen at 13° C. and 



7-52 mm., 



corresponding to N 10'54 



CsH.AN, requires N 10-38. 



4.-Nitro-'2-amino-A:'-melhoxystilbene is not very soluble in ether, alcohol, or 

 cold benzene, but dissolves readily in hot acetic acid or acetone. 



The sulphate was precipitated in the form of white needles on the addition 

 of a few drops of concentrated sulphuric acid to a solution of the amine in 

 acetone. 



The hydrochloride was obtained as white needles on passing jiydrogen 

 chloride into a solution of the amine in the same solvent. 



The action of water on both salts restored the original amine. 



The aceiyZ-derivative of 4-nitro-2-amino-4'-methoxystilbene was prepared 

 by boiling this substance under reflux for 3 hours with excess of acetic 

 anhydride. The product separated from glacial acetic acid as bright-yellow 

 plates, melting at 184°-185° C, and gave on analysis the following results: — 



0T006 gram substance gave 7'8 c.c. moist nitrogen at 20° C. and 765 mm., 

 corresponding to IST 8'96 

 C3^7B[ig04N"2 requires X 8-98. 



2'-i-6-'rrinitrostilbene. 



2'4'6-Trinitrostilbene was prepared by condensing with the aid of 

 piperidine 2-4"6-trinitrotoluene and benzaldehyde, the method used being 

 similar to that of I'feiffer and Monath (loc. cit.). 'I'he oily product was 

 pres.sed on a porous plate and recrystallized from glacial acetic acid, from 

 which yellow needles, melting at 156° C, separated. It dissolved readily in 

 hot benzene, acetic acid or acetone, but was soluble only to a sliglit extent in 

 alcohol or ether. 



4 • 6 -Dinitro- 2-aminostilhene. 



Glacial acetic acid (42 c.c.) was added to stannous chloride (16 grams), 

 and hydrochloric acid gas was bubbled into the mixture until the tin salt had 



