ON AMMONIACAL PLATINUM BASES. 41 



The formula requires: 



Theory Experiment 



1 2 



Platinum 197,88 — 52,09 51,82 51,49 



Sulphur 32,oo — 8,42 8,82 8.48 



Nitrogen 28,oo 



Hydrogen 10,00 



Oxygen 1 12, oo 



379,88 



The analysed sulphate was not perfectly free from silver. 



The existence of a chlorosulphate seems very probable. When hydrochlorie acid 

 was added to a solution of the sulphate, long needles of a bright yellow colour were 

 deposited, but they were mixed with octahedral crystals of the chloride. It seems 

 probable also, that an acid sulphate containing three mol. sulphuryl exists. 



14. Oxalate, basic 2HO . Pt^. H 3 o) C2 02+H 2 was obtained by Gerhardt *) from the 



basic nitrate (N:o 5) and oxalate of ammonium. It is a yellow and explosive precipi- 

 tate, soluble in hot water. I have not prepared this compound. 



15. Hydrate, 2HO, Pt\ NH 3 0H is obtained according to Gerhakdt 2 ) by adding am- 

 monia to the basic nitrate. The hydrate forms scarcely soluble shining crystals. The 

 hydrate was not examined by me. 



The formulas for all the known compounds of platinammine are as follow : 



fCl 



A. Chloroplatinammine R=Pt| MH ! 



I Cl 



1. Chloride RCL (1) 



2. Nitrite R . 2NO ä (8) 



3. Argento-nitrite R . 4NO,, . Ag, (3) 



t fil 



4. Xitrito-chlorideRl S(J (10) 



jBr 



B. Bromoplatinammine R=Pt\ NH 3 



Ici 3 



5. Bromide RBr 2 (2) 



6. Nitrite R . 2N0 2 (11) 



|nh 



C. lodoplatinammine R=Ptw H ^ 



I i 



7. Jodide RL (3) 



J ) Gerhardt 1. c. p. 310. 2 ) Gerhardt 1. c. p. 311. 



K. Vet. Akad. Handl B. 10. N:o 9. 



