74 P. T. CLEVE, 



The formula requires: 



Theory Experiment 



Platinum 197,88 — 36,52 35,92 



Nitrogen .- 84,00 — 15,50 15, m 



Carbon 144, oo 



Hydrogen 20,oo 



( )xygen 96, oo 



541,88 



4. Oxalate, R . L » . C 2 0. + H 2 0, was obtained by precipitating the nitrate (N:o 3) 

 with a solution of oxalate of ammonia, It forras a slightly rose-coloured microcrystal- 

 line powder, scarcely soluble in water. 



Analysis : 

 0,4650 gr. dried at 100° gave 0,1760 gr. platinum. 



Found The formule requires: 



Platinum 37,85 '37,77 



B. Compounds of the radicle, Pt{™C™;° 6 = R, 



I. C/iloride-i RCL. If the chloride of platosammine is boiled with water and ani- 

 line, and with so much alcohol that the aniline is raixed with the water, a light brown 

 solution is obtained, from which, on cooling, small and colourless nacreous, rhombic 

 scales are deposited. The chloride is generally rendered impure by a small quantity 

 of resinous raatter. It is soluble without difficulty in hot water and recrystallises on 

 cooling. When boiled with nitromnriatic acid, the aniline is destroyed and some yellow 

 octahedral crystals, resembling the chloride of platinammine, are obtained. 



Analysis: The chloride dried at 100°. 



a. 0,4i3(i gr. gave 0,1745 gr. platinum and 0,3523 gr. chloride of silver =0,0624 gr. 

 chlorine. 



b. 0,4113 gr. gave 0,1713 gr. platinum. 



c. 0,2575 gr. gave 27 C. C. nitrogen (temp. of the water 18° Bar. 755 m.ra. t. 17°) 

 = 0,0308 gr. nitrogen. 



d. 0,2655 gr. gave 0,2075 gr. carbonic acid =0,072!» gr. carbon and 0,1050 gr. water 

 = 0,oii7 gr. hydrogen. 



The formula requires: 



Theory Experiment 



a bed 



Platinum 197,88 — 40,48 42,25 41,fi5 



Chlorine 70,92 — 14,51 15,08 - — — 



Nitrogen 56,00—11,46 11,97 — 



Carbon 144,oo — 29, '.6 27,48 — 



Hydrogen 20,oo — 4,09 4^ 



488,80 100,oo 100,39 



