OX AMMONIA CA L PLATINUM BAS KS. 79 



Pt2(NH 7 C 2 )2NH 3 . CL. If the chloride were a chloroplatinite it ought by this reaction, 

 to have given a mixture of the chloride of platodiammine and the chlorides Pt4(NH 7 

 C,). CL or Pt3(NH 7 CL)NH 3 CL The choise is left between the formulas 



Pt|p, N HlC2 ' or Pti XH 7 c 2 cl the former being the more probable. 



The com|)Ounds, containing both ammonia and ethylamine and prepared by me 

 are derived from the following radicles: 



A P+ i2NH 3 p Pti NH 3 O Pf< NH 3-^ H : C 2 



\. rl l2XH ; C 2 rJ * * l lNH 7 C 2 ^- rr INH, .XH r C 2 . 



A. Compounds of the radicle, Pt{^JJ 3 c = R. 



1. Chloride, RC1_, was obtained by boiling the chloride of platosemidiammine 

 with aqueous ethylamine. The chloride was easily dissolved, and by evaporating the 

 solution in the water-bath and finally över oil of vitriol, a yellowish honey-like mäss 

 was produced. 



Analysis, the chloride dried över sulphuric acid. 



0,/oihi gr. ga ve 0,3450 gr. metallic platinum and 0,5113 gr. chloride of silver = 

 0,1264 gr. chlorine. 



The formula requires: 



Theory Experiment 



Platinum 50,38 49.»» 



Chlorine 81,05 18,or> 



The chlorine did not crystallise well and as by the analysis alone the correctness 

 of the formula could not be satisfactorily decided. I prepared the double chloride with 

 protochloride of platinum and subjected this to. a complete analysis. This double chlo- 

 ride having exactly the formula Pt2NH 3 . 2NH 7 C 2 . CL.+PtCL, I have no doubts concer- 

 ning the formula of the chloride. 



If the solution of the chloride is inixed with iodide of potassium a strong smell 

 of ammonia arises and a chrome-yellow precipitate is obtained. This yellow compound 

 is the iodide 



p t /NH,I 



1 t lNH T C 2 .I 



2. Chloroplatinite, RCL/^CLPt, is immediately thrown down as a crystalline poAv- 

 der of a hne green colour by mixing together the solution of the preceding compound 

 and that of chloroplatinite of potassium. 



Analysis: the double chloride dried at 100°. 



a. 0,2345 gr. gave 0,1405 gr. platinum and 0,?055 gr. chloride of silver =0,0508 gr. 

 chlorine. 



b. 0,?7oo gr. gave 19,25 C. C. nitrogen (temp. of water 17°. Bar. 770 m.m. t. 

 16°) =^0,o?2j gr. nitrogen. 



