OLEFIANT GAS. 70S 



effect of a gentle heat; the gas is purified from adhering vapours 

 of alcohol and water, by passing it through sulphuric acid. This 

 gas has an odour which suggests that of garlic ; its density is 

 2 1 6'6, and combining measure 4 volumes. It is condensed into 

 a limpid liquid at 0.6 ( 17 cent.) 



Chloride of acetyl is absorbed by perchloride of antimony 

 (Sb C1 5 ), and when the saturated solution is diluted with water, 

 an ethereal liquid separates, consisting of a mixture of chloride 

 of acetyl and hydrochloric acid, with a new compound C 4 H 3 C1 3 , 

 or C 4 H 2 Cl 2 -fH Cl. This last when distilled with an 

 alcoholic solution of potash is resolved into chloride of potas- 

 sium, water and another new volatile liquid, C 4 H 2 C1 2 , or 

 C 2 H Cl. Lastly, by continuing the action of chlorine upon the 

 preceding bodies, the compound C 4 H 2 C1 4 is obtained, or 

 rather C 4 H C1 3 + H Cl, for potash transforms it into C 4 H C1 3 , 

 and chloride of potassium. (Regnault). 



Bromhydrate of bromide of acetyl, C 4 H 3 Br+H Br, is a 

 colourless liquid, boiling at 129.5 cent., obtained by passing 

 defiant gas into bromine. 



Bromide of acetyl, C 4 H 3 Br = Ac Br, a gaseous body of 

 density 3691, of which the preparation is the same as that of 

 chloride of acetyl. 



lodhydrate of iodide of acetyl, C 4 H 3 I + H I. This com- 

 pound is slowly produced when iodine is left in a bottle of 

 olefiant gas at the ordinary temperature, and sublimes in white 

 crystals ; but it is best prepared, according to Regnault, by 

 heating iodine to 122 or 140 in a convenient vessel, and intro- 

 ducing pure olefiant gas into it, till all the iodine is converted 

 into a pulverulent yellow or white substance. The compound 

 fuses at 172.4 (78 cent.), and may be sublimed in olefiant gas, 

 but not in air without decomposition. When heated with hy- 

 drate of potash and alcohol, there is a disengagement of olefiant 

 gas arid formation of iodide of potassium, and other products 

 which have not been studied. This body does not furnish 

 products corresponding with those derived from the chlorhy- 

 drate of the chloride of acetyl, when decomposed ; it is very 

 doubtful, therefore, whether the former is similar in constitu- 

 tion to the latter, as represented above. 



Cldoroplatinate of chloride of acetyl, C 4 H 3 PtCl 2 =C 4 H 3 Cl + 



