OP ARTS AND SCIENCES. 63 



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



Platinum 20.90 20.76 



Properties. Pale yellow scales (deeper in color than the corre- 

 sponding salt of the tertiary amine), slightly soluble in boiling water, 

 almost insoluble in cold water and alcohol. 



The bromide of the base was obtained during the preparation of 

 the amines in white scales very slightly soluble in water or alcohol, 

 insoluble in ether, easily decomposed by aqueous sodic hydrate, and 

 melting with decomposition between 280° and 290°. 



The salts just described are identical with those of the a modifica- 

 tion of Berlin's secondary chlorbenzylamine ; and, as we could find no 

 trace of any other modifications, there can be but little doubt that 

 the /3, }', and 8 forms of Berlin consisted of mixtures of para- and ortho- 

 compounds, in varying proportions, and this view is still further sup- 

 ported by the fact that the melting-points of these so-called isomeres 

 are very near together, those of the chlorides in fact all lying within 

 ten degrees. 



Monoparachlorbenzylamine, G^H^GIGH^NH^ precipitated from the 

 aqueous solution of its bromide with sodic hydrate and distilled with 

 steam forms a colorless oil nearly, if not completely, insoluble in 

 water, but soluble in ether ; on exposure to the air it is converted, 

 almost at once, into a white soluble crystalline carbonate ; if therefore 

 care is not taken to exclude carbonic anhydride, small quantities of 

 the amine seem to dissolve easily in water. 



The carbonate was made by exposing the free base to carbonic 

 anhydride or even to the air, and was always left when an ether 

 extract containing the base was allowed to evaporate spontaneously. 

 Crystallized from water, it forms white plates often of considerable 

 size, from alcohol needles; melting-point, 114°-115°; it dissolves 

 slowly in cold, quickly and freely in hot water and alcohol ; sodic 

 hydrate sets free the oily amine. 



The chloride made by dissolving the carbonate in hydrochloric acid 

 crystallizes in long, narrow white plates, soluble in water and alcohol, 

 sparingly soluble in glacial acetic acid, and essentially insoluble in 

 ether, benzole, and carbonic disulphide; melting-point, 239°-241°. 



Monoparachlorbenzylamine Ghlorplatinate, ( G^HJJlGH^NH^^tGl^ 

 made by mixing a solution of the chloride of the base with platinic 

 chloride, purified by washing with a mixture of alcohol and ether, 

 and dried at 100°, gave the following result: — 



0.3067 grs. substance gave 0.0866 grs. platinum. 



