531 



have been satisfied to fix the composition of this body by the analysis 

 of the well-crystallized platinum-salt, which was found to contain 



C a H 18 P0 a . Pt C1 3 = [(C 2 H 6 ) 3 2 ** 2 2 p]d, Pt Cl 



and by that of the iodide. The latter was formed by precipitating 

 the platinum-salt by sulphuretted hydrogen, decomposing the chloride 

 formed in this manner by oxide of silver, and dissolving the triethyl- 

 ated compound in hydriodic acid. The solution was evaporated to 

 dryness, the residue washed with absolute alcohol and recrystallized 

 from the same liquid. This iodide is more soluble and less beautiful 

 than the corresponding compound in the nitrogen-series. Analysis 

 showed, however, that it has an analogous composition, viz. 



C 16 H 35 P a 4 1= [(C 2 H 5 >; C * g 2 p] I, C 8 H 1T P0 a . 



Whatever view may be taken respecting the composition of the 

 compounds described in the preceding pages, it is obvious that 

 chloracetic ether, in its action on triethylamine and triethylphosphine, 

 exhibits the deportment of one molecule of hydrochloric acid, and 

 that the complex atom, 



ftH.o.sc.fi.^itop; 



which in chloracetic ether is united with one equivalent of chlorine, 

 represents in the compounds thus produced one equivalent of hydrogen. 

 These substances are ammonium-salts of double substitution, the 

 compound atom, which replaces one of the hydrogen equivalents of 

 the ammonium, containing itself an equivalent of ethyl, substituted 

 in this atom for the hydrogen originally present. 



Compounds of a similar construction have been previously obtained. 

 In his beautiful researches on the amidic acids, M. Cahours has proved 

 that the ethers of benzamic, toluylamic, and cuminamic acids exhibit 

 the same tendency to combine with acids which characterizes the 

 amidic acids themselves. In these ethers the ethyl-atom may be 

 exchanged at pleasure for hydrogen and metals ; it obviously has 

 been introduced into the molecular system of these bodies by what 

 may be called a secondary substitution. The constitution of the 

 compounds obtained from the first salts by the action of oxide of 

 silver is less transparent. It may be that there is between these two 

 classes a relation similar to that which obtains between amidic ethers 



