64 P. T. CLEVE, 



VIII. Sulphato-compound 



OH 



8. Sulphate Pt j^SO 



H. COMPOUNDS OF PLATO-MONO-DIAMMINE l ). 



R=pt"{N i Hr NHa 



1. Chloride, RCL, If hydrochloric acid is aclded to a concentrated solution of 

 the nitrate of the base and the liquid refrigerated with ice, the chloride soon separates 

 in small colonrless shining scales and prisms. 



The chloride thus obtained was collected on a filter, pressed between paper, dis- 

 solved in water and recrystallised. The chloride forms easily soluble, colourless prisms 

 or scales. The chloride analysed was dried at 100°. 



Analysis : 



a. 0,3360 gr. gave 0,2090 gr. platinum and 0,3020 gr. chloride of silver =0,0747 gr. 

 chlorine. 



b. O,3G30 gr. gave 41 C. C. nitrogen (temp. of the water 16°. Bar. 763 m.m. 

 t. 16°) =0,0478 gr. nitrogen. 



The formula requires: 



Theory Experiment 



a b 



Platinum 197,88—61,88 62,20 



Chlorine 70,92 — 22,18 22,23 — 



Nitrogen 42,oo — 13,13 13, io 



Hydrogen 9,oo — 2, si — 2,41 (loss) 



319,80 100,oo 



The chloride is directly united with chlorine and gives the chloride of platin- 

 mono-diammine, Pt3NH 3 . Cl 4 . Chloroplatinite of potassium, mixed with the solution, 

 gives mica-like shining quadratic scales of the following compound. 



2. Chloroplatinite PM N i T 3 ~ NH ci~cil 



inh 3 "nh 3 ci^cil^*^' This remarkable double chloride, isomeric 

 "*' (nhJci 

 with the green chloride of Magnus and with the chlorides of platosammine and plato- 

 semidiammine, was first noticed by Mr Peyrone 2 ) who obtained it by adding ammonia 

 to the protochloride of platinum, dissolved in muriatic acid. I have also obtained the 

 compound in the same manner, but only in very small quantities and mixed with the 

 chloride of Magnus, from which compound it may easily be purified by solution in 



1 ) Platosarai-semidiammine Cleve in Öfvers. af K. Vet.-Ak. Förh. 1871. p. 175. 



2 ) Ann. Ch. u. Phann. 55. 1845 p. 205. 



