ON AMMoNIAOAL PLATINUM BASES. 



metals unitecl with ainido-ammonium. In the »Chemie der Jetztzeit» Prof. Blomstrand 

 furnishes the following formula for the compounds of »Sulphatoplatinamin»: 



Pt 



j 2NH 3 .o/ 2 and for the hydrate of the base, in which the sulphuric acid is pre- 



H. 



OH 

 2NH, 



cipitated by the chloride of bariuni he gives the formula Pt " N 3 \ o 2 . 



' OH 



so, 



In a paper published in the »Öfvers. af K. Vet.-Ak. Förhandl.» 1870 p. 777 *) 

 I have adopted the views of Blomstrand, at the same time giving a review of several 

 new compounds of four platinum bases, of which two and two are isomeric and all 

 containing 2 Mol. XH 3 and one atom of platinum. To explain the isomerism I sup- 

 posed two of the bases to contain one molecule of diammonia N H 3 ~N H 3 united with 

 platinum, and the two others two single molecules of ammonia, both directly united 

 with platinum. The formulas for the chlorides of the four bases may be written in 

 followino- manner. 



1. MISS 



Chloride of Reiset (2 bas.) 

 I c. 



I NH 3 



" I 



Chloride of the new basis. 



VI 



2. Pt 



;C1 



N H 3 Cl 

 CJ 



IV 



Pt 



Cl 



NH 3 ~XH 3 C1 



Cl 



Cl 



Chloride of Diplatinammine (Gerhardt). 



Chloride of the new basis. 



In en appendix to my paper Prof. Blomstrand proposes a raore rational termi- 

 nology for the different bases of platinum. 



The seven known bases of platinum are named, and their chlorides formulated, 

 as follows: 



I. With bivalent platinum. 

 1. Platinammine. 



Pt J N «3 



II. With tetratomic platinum. 

 2. Platinammine. 



N H, Cl 



,ci 



Pt 



Cl 



NH3C1 

 NH3C1 



Cl 



Chloride of the 2:d basis of Reiset. 



3. Platosemidiammine. 

 Pt{ G] 



Chloride of Diplatinammin of Gerhardt. 

 4. Pia tinsemidiammine. 



r 



pt! 



Cl 



l ) Om några isomera Platinabaser. 



