1864] 



Chloride of Iodine upon Organic Bodies. 



541 



iodide into the chloride of allyle ; and with this the other equivalent then 

 directly combines. 



Action of Chloride of Iodine on Bi'omide of Aldehydene.—k. mixture 

 of 1 volume of bromide of aldehydene and 2 volumes of chloride of iodine 

 was exposed in a sealed tube to the temperature of 100° Cent, for about two 

 hours. The tube was then opened, the excess of chloride of iodine removed, 

 and the dark-coloured oil which was formed washed with dilute potash 

 and distilled. The entire liquid passed over between 175° and 200" Cent., 

 suffering at the same time slight decomposition with liberation of iodine. 

 The portion distilhng between 190° and 200° was collected apart, deprived 

 of free iodine by agitation with mercury, and analyzed. The numbers ob- 

 tained approach sufficiently near the formula C^ Hg Br CI I to leave no 

 doubt as to its being the true one : — 



Theory. Experiment. 



' , 



Per cent. 



C, 24-0 8-90 9-47 



Ilg 3-0 I-IO 1-43 



Br...... 80-0 



CI 35-5 90-00 91-00 



I 127-0 



269-5 100-00 



This body I suppose I must call iodo-chlor-brom-aldehydene. It is a 

 colourless oil, is insoluble in water, and, like the former body, has a sweet 

 and biting taste. It is formed by the direct addition of one atom of chlo- 

 ride of iodine to one atom of bromide of aldehydene. 



I have also tried the action of chloride of iodine on cyanide of allyle, in 

 the expectation of forming the body Cg H. Cy CI I, and from this, by the 

 action of potash, the acid Cg O^. My expectations, however, were not 

 realized. On heating these substances together as in the former cases, all 

 the iodine of the chloride of iodine was set free ; and I obtained on evapo- 

 rating the liquor, instead of an oil, a mixture of chloride of ammonium and 

 an organic acid, probably crotonic. 



The solution of chloride of iodine employed in these and my former ex- 

 periments on ethylene and propylene gases, was made by conducting a 

 stream of chlorine into 1600 grains of water holding in suspension 700 

 grains of iodine. The mixture was kept cold and agitated repeatedly 

 during the passage of the gas, which was interrupted when all the iodine, 

 with the exception of a trace, had been dissolved. 



It is highly probable that bromide of acetylene (C^ Br2) and similar 

 non-saturated bodies may be also made to combine directly with chloride 

 of iodine. 



