78 P. T. CLEVE, 



Theory Experiment 



a b 



Platinum 593,04—55,98 55, io — 



Chlorine 212,76 — 20,06 20,oo 



Carbon 144, ut/ — 13,58 — 14, .ii 



Hydrogen 26,oo — 2,45 — 2,*3 



Nitrogen 84,00 



1060,40 



E. Compounds of the radicle Pt{JjJJ 3 c =R. 

 lodide, RL, was obtained by adding iodide of potassium to a solution of the 

 chloride Pt{ NH 3 C ) Cl., when the iodide is precipitated as a yellow powder. It was boi- 

 led a short time with the liquid, and then analysed. 



a. 0,^185 gr. gave 0,no:s gr. metallic platinum. 



b. 0,i3i;o gr. gave 0,2130 gr. carbonic acid =0,0581 gr. carbon and 0,0805 gr. water 

 = 0,0096 gr. hydrogen. 



The formula requires: 



Theory Experiment 



a b 



Platinum 197,88 — 35,23 34,03 



Carbon 72,00- — 12, 18 — 13,3:' 



Hydrogen 10,oo — 1,78 — 2, 20 



Iodine 254, 00 



Nitrogen 28, ou 



"5617* 



The chloride, Ptj NH 3 C ] CL being formed by a loss of aniline from the chloride 



Pt\2NH 3 c fCL, the iodide Pt{ NH 3 c }Oo may be considered to originate from the latter 

 chloride, by the loss of 2 mol. aniline. 



II. Bases of platinum containing Ethylamine. 



Wurtz prepared the chloride and the sulphate of a base containing platinum and 

 ethylamine corresponding to platodiammine, viz: 



Pt)y NH ' c fCl_. an Pt| 2NH 7 C J }0> . SO z , and by the action of ethylamine upon protochloride 

 of platinum he obtained a compound of the emperic formula: 



Pt2(NH 7 C 2 )Cl 2 . 

 To which of the four known isomeric compounds of the common formula 

 Pt2NH 3 .Cl> this chloride an^wers is doubtful, but it does not seem to be a chloropla- 

 tinite, as, according to Mr Gordon, it yields with amonia a chloride of the formula 



