76 P. T. CLEVE, 



Analysis the sulphate dried at 100°: 



0,4970 gr. gave 0,i9io gr. platinum and 0,23io gr. sulphate of barium =0,0317 gr. 

 sulphur. 



This formula requires: 



Platinum 38,51 38,43 



Sulphur 6,23 6,37 



C. Compounds of the radicle Pt{^ c =R. 



The chloride of this radicle is probably formed by the action of aniline, in ex- 

 cess, on the chloride of platosemidiammine, because once I obtained by this reaction a 

 product, whose composition nearly agreed with the formula Pt 2 . 4NH 3 . 5(NH 7 C 6 )C1 4 ; but 



on repeating the experiment I obtained the chloride Pt<L NH 3 c [Cl., from which fact I 



conclude that the chloride tirst obtained was a mixture containing- the chloride 



*ö 



pJ2NH, (p, 



1. Sulphate, R . Oo . S0 2 , was obtained by adding aniline to a hot solution of 

 the sulphate of platosemidiammine. On cooling the liquid the sulphate is separated in 

 tine needles arranged in star-like groups. The sulphate easily löses a part of its aniline, 

 and if its solution is boiled a part of the aniline is evolved with the vapours of the 

 water and another changed to resinous substances. My first analyses were executed 

 with a partly decomposed sulphate and gave the formula Pt 2 4NH 3 . 5NH 7 C 6 . 4 . 2S0 2 . 

 More recent analysis of a sulphate dried only two days över sulphuric acid, have given 

 the following results: 



a. 0,2780 gr. gave 0,0933 gr. platinum and 0,ioso gr. sulphate of barium =0,0144 

 gr. sulphur. 



b. 0,i8io gr. gave 0,58t>5 gr. carbonic acin =0,1599 gr. carbon and 0,2020 gr. water 

 = 0,0224 gr. hy drogen. 



The formula requires: 



Theory Experiment 



a b 



Platinum 197,88 — 32,60 33,56 



Sulphur 32,oo — 5,27 5,18 



Carbon 216,00—35,59 33,24 



Hydrogen 27,oo — 4,45 4,65 



Nitrogen 70, oo 



Oxygen 64,00 



606,88 



The analysed sulphate, when examined with the microscope, had a homogeneous 

 appearance, but, as the analysis clearly shows, it did not contain a sufncient quantity 

 of aniline; however no other formula can be calculated from the analysis. 



