366 Z Remsen— Phosphorus Oxychloride. 



great ease, and that phosphorus oxychloride may be obtained 

 in this way in any quantity. 



Pure phosphorus terchloride boiling at IT was placed in a 

 flask. In the cork of the flask were three openings. In one of 

 these was inserted a thermometer which dipped intt) the liquid ; 

 in another was a tube, leading from the ozone-generator, which 

 served to conduct the ozone into the liquid; in the third was 

 placed a tube which in turn was connected with an inverted 

 Liebig's condenser, the latter serving to condense and return to 

 the flask any vapors that might be formed. Oxygen, thoroughly 

 dried by sulphuric acid and calcium chloride, was now passed 

 through the tube which served as ozone-generator. At first I 

 employed a Siemen's ozone-tube which was connected with an 

 induction-coil. The action in this case was not marked, al- 

 though I soon observed that the thermometer indicated a rise 

 in the temperature of the trichloride. At the beginning of the 

 in the flask was the 

 15°. In a short time 

 it rose to 36° where it remained stationary, as long as ozone 

 was conducted into the liquid. As soon as the current was 

 stopped, the temperature began to fall and continued to fall 

 gradually until the ordinary temperature was reached. 



In about an hour the process was interrupted, and the liquid 

 subjected to distillation. Its boiling point was markedly 

 changed. Only a drop or two passed over before the thermome- 

 ter indicated 80° and then the mercury rose gradually to 110° 

 when all had passed over. About half the liquid boiled below 

 90°. This was again subjected to the action of ozone, but now 

 instead of using Siemen's tube, as at first, Wright's tube con- 

 nected with the Holtz electrical machine was used, and with 

 much better results. The arrangement of the apparatus in this 

 second experiment was the same as in the first. The tempera- 

 ture of the liquid in this case also began to rise as soon as the 

 ozone was passed into it. In a few minutes the thermometer, 

 which at the beginning of the operation indicated 15-5° stood 

 at 44°, where it continued to stand with slight fluctuations dur- 

 ing the entire process. At the surface of the liquid the increase 

 in the temperature was so marked, that a portion was converted 

 into vapor, which was returned to the flask by means of the 

 condenser. In the flask, a few drops of a yellowish, resinous 

 material made their appearance, principally at the end of the 

 ozone delivery-tube. The quantity of this substance formed 

 was so small, as to preclude the possibility of an investigation. 

 On repeating the experiment subsequently, this substance al- 

 ways appeared as a product. Whatever it is, it seems to be 

 somewhat volatile with the vapor of the oxychloride of phos- 



