64 



PROCEEDINGS OP THE AMERICAN ACADEMY 



Platinum 



Calculated for (C 7 H 6 ClNH 8 ) 2 PtCl 6 . Pound. 

 28.39 28.23 



Properties. Bright yellow branching plates or needles, arranged in 

 round woolly groups when crystallized from water, in which and alco- 

 hol it is decidedly soluble. 



The bromide of the base formed in the preparation of the amines 

 resembles the chloride in appearance and solubility, but is somewhat 

 less soluble in cold water, and melts with decomposition between 

 225° and 230°. 



The foregoing results differ from those obtained by Berlin only in 

 the melting-point of the chloride, which he found 197°; he gives no 

 melting-points for the carbonate and bromide. 



To make it easier to compare the new melting-points with those in 

 use heretofore, we have collected them in the following table ; the 

 second column of which gives the melting-points of the pure sub- 

 stances made by us, and the third the melting-points determined by 

 the chemists mentioned in the fourth column. 



Name of Substance. 



True 

 Melting-point 



Old 



Melting-point 



Authority for 

 Old Melting-point. 



Parachlorbenzylchloride . . 

 Parachlorbenzylbromide . . 

 Paracblorbenzylalcohol . . 

 Parachlorbenzylcyanide . . 

 Paraehloralphatoiuylic Acid 



Parachlorbenzylsulphocyanate 

 Primary Amine .... 



,, „ Chloride . 



,, ,, Bromide . 



„ ,, Carbonate 



Secondary Amine. . . . 



„ „ Chloride 



„ ,, Bromide 



Tertiary Amine .... 



,, ,, Chloride . 



29° 

 48J° 

 70J° 

 29 J ( ?) 

 103i-104 o 



17° 



Liquid. 



239°-241° 



225°-230° 



114°-115 



29° 



288° 



1>(I -."Ml- 1 



78*° 

 196° (?) 



Liquid. 



66° 



Liquid. 



60° 



68° 



Liquid. 

 197° 



Liquid. 

 288 D -289° 

 283°-290° 



KK Kit 



170°-175° 



Beilstein and Geitner. 



Beilstein and Kuhlberg. 



Neubof. 



Nenhof. 



Radziszewski. 



Berlin. 



Berlin. 



The revision of the parachlorbenzyl compounds will be continued 

 in this laboratory ; in fact, the aldehyde and some of the sulpho- 

 derivatives have been already made and partially studied by Mr. J. 

 Fleming "White, whose work will form the subject of a later paper 

 of this series. 



