OX AMMONIACAL PLATINUM BASES. 17 



Analysis by Reiset: 



Theory 



Platinum 40,48 — 40,52 197,88 — 40,73 



Iodine 52,29 — 52,37 254,oo — 52,27 



Nitrogen 5,75 — 28,oo — 5,76 



Hydrogen 1,48 6,oo — 1,24 



100,oo 485,88. 100,oo 



The iodide unites directly with two atoms of iodine and then produces a black 

 unerystalline powder, the iodide of platinammine. If boiled with nitro-muriatic acid the 

 iodide gives off iodine and is transformed to yellow qvadratic octahedrons, doubtless of 

 the chloride of platinammine. 



4. Cyanide R . 2CN was prepared by Bucktox l ) by the action of cyanide of silver 

 upon the chloride of the base. 



The analysis made by Bucktox gave : 



Theory 

 Platinum 69,64 p. et. 69,70 



An isomeric compound was obtained by Reiset by saturating the hydrate of 

 platodiammine with prussic acid. The same isomeric compound was also obtained by 

 Bucktox by the action of cyanogen upon the hydrate of platodiammine. M. Bucktox 



proved that it was a donble-cyanide of platinum and ptatodiammine Pt Wj/ c ']. 2 [Pt. 



By the aetion of ferrocyanide of potassium on the nitrate of chloro-platindiam- 

 mine (the nitrate of Gros') I also obtained the same double cyanide as one of the 

 produets 2 ). 



5. Platocyanide R(CX) 4 Pt. By mixing a solution of platocyanide of potassium 

 with a solution of the nitrate of the base, the colourless liquid assumes a yellowish 

 tinge, and soon begins to deposit a voluminous, unerystalline precipitate of a brilliant 

 orange-yellow colour. When washed and dried the compound forms pieces of a splen- 

 did orange-colour. 



Analysis of the platocyanide dried at 100°. 



1. 0,2870 gr. gave 0,2090 gr. metallic platinum. 



2. a. 0,3915 gr. gave 0,2885 gr. metallic platinum. 



b. 0,3330 gr. gave 0,0490 gr. water =0,oosi gr. hydrogen and 0,1040 gr. carbo- 

 nic acid =0,02*i jjr. carbon. 



o 



1 ) Buckton Ann. Ch. u. Pharm. 78. 1851. p. 337. 



2 ) Cleve Am. Plåt. För. p. 51. By the reaction a compound was obtained as principal produet, crystallising 

 in brownish-violet octahedrons, and from wliose analysis I calculated the formula: K 2 , Fc 2 , Pt ä , 12NH 3J 

 12CN, 30. If we assume that the compound contains three atoms of hvdrogen more than the formula 

 indicates, which can scarcclv bj proved by analysis, we may, with the greatest chance of probability, write 

 the formula thus: 



K i 



•("Ssint^-.» 



K 

 In this case the compound is a ferrocvanide of platodiammine and potassium. 



3 



K. Vet. Akad. H.mril. B. 10 K-., 



