62 PROCEEDINGS OF THE AMERICAN ACADEMY 



ration of the amines crystallizes in scales like those of the bromide 

 of the secondary amine soon to be described, but less soluble in 

 alcohol. 



Triparachlorbenzylamine Chlorplatinate, \_(C 6 H i ClCff. 7 ) 3 NH].,Pt Cl 6 , 

 was made by adding aqueous platinic chloride to an ethereal solution 

 of the base, and washing with water, alcohol, and ether ; dried at 100°, 

 it gave the following results on analysis : — 



I. 0.2380 grs. substance gave 0.0405 grs. platinum. 



II. 0.2796 grs. substance gave 0.0471 grs. platinum. 



Found. 

 Calculated for [(C 7 H 6 Cl) 3 NH] 2 PtCl 6 . I. H. 



Platinum 16.54 17.01 16.84 



Properties. Pale orange microscopic irregular plates, almost insol- 

 uble in water, alcohol, and ether. 



It is worthy of especial note that Berlin's tertiary chlorbenzylamine 

 melted at 88°-89°, as this is the only case in which we have found 

 the melting-point of the pure substance lower than that of the impure. 

 His chloride melting-point, 170°-175°, crystallized in well-formed 

 rhombohedra with two molecules of water, which it lost in vacuo. 

 Our (impure) salt differed from his not only in appearance and melt- 

 ing-point, but also in losing nothing in vacuo ; and we have never 

 observed any rhombohedra like those described by him, although we 

 have tried very often and under various conditions to obtain them. 



Diparachlorbenzylamine, {C^H^WH^^NH. The bromide of this 

 base, separated from the other amines as described above, and purified 

 by repeated boiling with alcohol, was decomposed with aqueous sodic 

 hydrate ; the oil thus obtained solidified on stirring, especially if it 

 was touched with a crystal of the substance. 



Properties. White radiating bladed crystals ; melting-point, 29° ; 

 insoluble in water, soluble in alcohol and glacial acetic acid, freely 

 soluble in ether, benzole, and carbonic disulphide. 



The chloride fell as a white precipitate on adding hydrochloric acid 

 to an alcoholic solution of the base ; microscopic rhombic and pris- 

 matic plates apparently monoclinic, slightly soluble in water, alcohol, 

 and glacial acetic acid, insoluble in ether and carbonic disulphide ; 

 melting-point, 288°. 



Diparachlorbenzylamine Chlorplatinate, [( C 6 II i ClCH.^^NH^Pt Cl 6 , 

 made by adding aqueous platinic chloride to the alcoholic solution of 

 the base, and purified by washing with water, was dried at 100°, and 

 analyzed. 



0.2389 grs. substance gave 0.0496 grs. platinum. 



