448 
DE. A. W. HOFMA^s’X OX THE PHOSPHOErS-BASES. 
requires 
Theory. Experiment. 
f 
. 
1 equiv. of Urea-compound . 
. . 211 
85-25 
1 equiv. of Hydrogen . . 
. . 1 
0-41 
1 equiv. of Chlorine . 
. . 35-5 
14-34 
14-02 
1 equiv. of Chloride . 
. . 247-5 
100-00 
The brown liquid which is formed, with considerable evolution of heat, when trimethyl- 
phosphine is brought in contact with mustard oil, gradually deposits well-fonned ti'ans- 
parent colourless prisms, the habitus of which resembles that of the coiTesponding ethyl- 
compound. The crystals were not analysed, but there can be no doubt that they were 
the methylated phosphorus-urea of the allyl-series 
(C S)" 'I 
C7H,4NPS = (CH3)2 np. 
(ch3)(C3H3)J 
Phosphoretted hydrogen is without action on the sulphocyanates of phenyl and allyl. 
In conclusion, I beg to thank Drs. A. Leibius and M. HoLZiLVN'X for them assistance 
in some of the experiments connected with this inquii’y. 
