312 Hoyal Society r — 



facHity.*J We xf\\\ ' spedfy ^^^^ following compounds, the study of 

 which we haTeroore or less completed. I '^ m ^-^irjtu Invif),' u hi/m/ 



Acryle-oxamethmiCi or o!cam«te of^aet^yle, is readily formed by 

 adding alcoholic ammonia in small quantities to oxalate of acryle, 

 until a permanent precipitate is produced. The filtered solution de- 

 posits on evaporation the oxaniate in magnificent crystals. 



Carbonate of acryle is an aromatic oily liquid, lighter than water. 

 It is formed like the other carbonic ethers, by the action of sodiunL 

 upon the oxalate. An alcoholic solution of this substance, when 

 treated with baryta, furnished carbonate of barium and aery he alcohol. 



Benzoate of acryle is readily produced by the action of chloride of 

 benzoyle upon acrylic alcohol. It is a liquid heavier than water, 

 which boils at 220°, and possesses an aromatic odour, similar to that 

 of benzoic ether. The analysis of this substance leads to the 

 formulaain!.!,.... e^Hi„0,=C„[H,(C,H,)]0,r^-a ■ 



The same body is easily produced by the mutual reaction of iodide 

 of acryle and benzoate of silver. . ;? o / m\ 



Acetate of acryle, obtained by the action of iodide of acryle Upon' 

 acetate of silver, is a liquid lighter than water, of an odour resem- 

 bling that of common acetic ether. According to our analysis, it 

 contains C,„H,0,=C,H,(C,H,) O,. ! 



Cyanate of silver is most violently attacked by iodide of acryle, 

 even in the cold. The heat generated during this reaction is so 

 powerful that the whole of the new product distils over. The sub- 

 stance thus obtained has an incredibly penetrating odour, and causes 

 lacrymation in the highest degree. The analysis of this colourless 

 transparent liquid, which boils at 82°, led to the formula ,11 .'J) ^) 

 C„H,NO,=C,(C„H,)NO,. ;. .'p. 1 



This is the cyanate of acryle. Gently warmed with a solution of am- 

 monia, this liquid readily dissolves, and the solution deposits upon 

 evaporation magnificent crystals, which are nothing but acrylic urea, 



C,H,N,0,=:C,H3(C,H,)N,02, 

 corresponding to thiosinnamine, the long-known sulphur-urea term of 

 thisserie^, ■ , CeH8N2S2 = C2(H^C„H,)N,S,. .]ii-t^\^i'^ 



Aniline produces with cyanate of acryle an aualogoujl»8ub6tiihce,' 

 which crystallizes remarkably well. ; ; i I ' > 



When treated with water, cyanate of acryle is gradually converted 

 into a solid crystalline substance. The compound obtained in this 

 manner has the composition and all the properties of sinapoline or 

 diacry lie urea. Its formula is 



and its formation is illustrated by the following equation : — 

 2C8H5NO2+ 2H0 = Ci4 H13N2 O2 + 2CO2. 



V ,, J V ., ' 



Y '' 



Cyanate of acryle. Sinapoline. r - ^ 



Cyanate of acryle is decomposed by a concentrated solution of 



potassa ; a solid substance is rapidly formed, which floats upon the 



surface of the solution, and which is nothing but the same sinapoline. 



