264 BENZENE. 



and by heating ammonium sulphocyanate with anil in 

 for a long time. 



Diphenylsulphocarbamide (Sulphocarbanilide), 

 CS (^H.C 6 H 5 ) 2 . Is produced by bringing together carbon 

 bisulphide with anilin, slowly at the ordinary tempera- 

 ture, rapidly by heating a mixture of carbon bisulphide, 

 anilin, and alcohol. Colorless laminge. Fusing point, 

 140. Insoluble in water, easily soluble in alcohol and 

 ether. 



Phenyl Mustard-oil, CS:KC 6 H 5 . Is produced 

 from diphenylsulphocarbamide by distilling it with 

 phosphoric anhydride ; by heating with concentrated 

 hydrochloric acid, the vessel being connected with 

 an inverted condenser ; and by mixing its alcoholic 

 solution with an alcoholic solution of iodine. Color- 

 less liquid, with an odor very similar to that of mus- 

 tard-oil. Boiling point, 222. Combines directly 

 with ammonia, forming phenylsulphocarbarnide ; with 

 anilin forming diphenylsulphocarbamide ; with al- 

 cohol at 110-115, forming phenylxanthogenamide, 



{~M"T-J (^6TT5 

 Q r2*TT5 which is also formed by heating phenyl- 



sulphocarbamide for a long time with alcohol at 140- 

 150. Colorless crystals ; fusing point, 65. 



Phenylcyanamide (Cyananilide), CKNH.OTP, is 

 produced by conducting dry cyanogen chloride into 

 an ethereal solution of anilin; and by digesting a 

 solution of phenylsulphocarbamide with lead oxide. 

 Colorless, long needles, arranged concentrically. Fusing 

 point, 36-37. Difficultly soluble in water, easily solu- 

 ble in alcohol and ether. "Without basic properties. 

 Is spontaneously transformed, even at the ordinary 

 temperature, into the polymeric compound, triphenyl- 

 melamine C 3 H 3 (C 6 H 5 ) 3 ]S[ 6 , which crystallizes in prisms, 

 fusing at 162-163. 



Diphenylguanidine, C 13 H 13 ]tf 3 = C^ 3 H 3 (C 6 H 5 ) 2 . Is 

 produced from diphenylsulphocarbamide when its 

 solution in alcoholic ammonia is treated with lead 

 oxide. Long, flattened needles, Fusing point, 147. 



