276 



in a former memoir, I have for the present been chiefly engaged with 

 the examination of sulphocyanide of phenyl. This body, which is 

 readily obtained in a state of absolute purity by rectification over 

 anhydrous phosphoric acid, is a colourless transparent liquid of 

 1'135 density at 15'5, and of a perfectly constant boiling-point at 

 222 C. under a pressure of O m *762. The odour is aromatic and 

 pungent ; it distantly resembles that of mustard ; the body in 

 question is in fact the mustard oil of the phenyl- series. 



Mustard oil, sulphocyanide of allyl. . C 8 H 5 N S a =C 6 H 5 , C 2 N S 2 . 

 Sulphocyanide of phenyl .......... C 14 H 5 N S 2 =C 12 H 5 , C 2 N S 2 . 



Sulphocyanide of phenyl may be distilled with water, and even 

 with hydrochloric acid, without undergoing any change. The al- 

 kalies, on the other hand, decompose it. Boiled with an alcoholic 

 solution of potassa, it is first converted into sulphocarbanilide, and 

 ultimately into carbanilide. 



2C 14 H. N S 2 + 4KO + 2HO=2KS + K 2 C 2 6 + C 2 



H 12 N 2 S 2 . 



Sulphocyanide 

 of phenyl. 



Sulphocarbanilide. 



Sulphocyanide 

 of phenyl. 



Carbanilide. 



When gently warmed with phenylamine, sulphocyanide of phenyl 

 is instantaneously converted into sulphocarbanilide, 



C U U 5 NS 2 + C 12 H 7 N = C 26 H 12 N 2 S 2 



Sulphocyanide 

 of phenyl. 



Phenyl- 

 amine. 



Sulphocarb- 

 anilide. 



A similar reaction takes place with ammonia. An alcoholic 

 solution of ammonia, when gently warmed with sulphocyanide of 

 phenyl, readily solidifies into a crystalline compound, which may be 

 obtained in beautiful needles by crystallization from boiling water. 



The new body is formed according to the equation 



C u H 5 N S 2 + H 3 N = C u H 8 N 2 S 2 



Sulphocyauide 

 of phenyl. 



Sulphophenyl- 

 carbamide. 



This substance is the thiosinamine of the phenyl-series ; like the 

 latter, it possesses the characters of a weak base. I have not been 



