106 PROCEEDINGS OF THE AMERICAN ACADEMY. 



potassic acetate and glacial acetic acid, according to the method of Schor- 

 lemmer. Upon diluting the contents of the tube, the oil which separated 

 distilled for the most part at 116°-117°, corresponding to the boiling 

 point of isobutyl acetate, 116°.^. The acetate was converted into the 

 alcohol by heating with alcoholic potassic hydrate, and its boiling point, 

 107°-108°, showel it to be isobutyl alcohol, boiling point 108°-109°. 

 Upon analysis the alcohol gave the required percentages of carbon and 

 hydrogen : — 



0.1737 gram of the substance gave 0.4090 gram CO2, and 0.2113 

 gram HgO. 



Calculated for CiHgOH. Found. 



C 64.86 64.22 



H 13,51 13.52 



Isobutyl sulphide was also prepared by boiling the chloride with an 

 alcoholic solution of potassic sulphide. It gave the required percentage 

 of sulphur : — 



0.1640 gram of the oil gave by the method of Carius 0.2G31 gram 



Calculated for (C4Hg)2S. Found. 



S 21.92 22.03 



As already explained, prolonged fractional distillation failed to show 

 the presence of any other chlorine derivative of this hydrocarbon except 

 one that dLstilled tolerably constant at 121°-122°. The quantity of this 

 product was too limited to admit of complete purification ; while the 

 analyses showed that it still contained monochlorbutane, the resulis are 

 sufficiently close to establish the presence of a dichlorbutane. Since no 

 dichlorhu'ane with this boiling point has hitherto been found, it is to be 

 regretted that our supply of material was so limited. But on account of 

 the vast amount of labor that would be necessary to obtain an adequate 

 quantity, it has not seemed of sufficient importance in the pressure of 

 other portions of this work. 



This substance gave the following results on analysis : — 



I. 0.1390 gram of tlie oil gave by combustion with plumbic chromate 



0.1960 gram CO2, and 0.1887 gram H.,0. 

 II. 0.2360 gram of the oil gave 0.5245 gram AgCl. 



Found. 

 I. II. 



38.46 

 7.08 



54.94 



