6 P. T. C LEVE, 



5. Platodiammine. 6. Platindiammvne. 



I NH 3 ~NH 3 C1 | Cl 



1 NH,^NH 3 C1 



Pt 



' NH ~NH.Cl 



Pt 



I Cl 



Chloride of the tirst basis of Reiset. Chloride of the basis of Geos (R^jwsky etc.) 



III. With hexatomic diplatinum. 



j OH 



l NH 3 ~NH 3 C1 

 n- / *■ r ■ P+ ) NH 3 ~NH 3 C1 



Diplatinaiammine. It' 3 3 



N Ry~N H 3 Cl 

 N H s " N H 3 Cl 

 OH 



This therminology, which has several advantages över the older one, is adopted 

 in the present treatise. 



Last year Prof. Odling 1 ) and also Prof. Kolbe 2 ) published their views concerniiig 

 the atomical composition of the ammonia-platinum-bases, but their opinions having 

 been criticised this year by Prof. Blomstrand 3 ), I do not find it necessary to men- 

 tion them any further here. 



My supposition that the isoinerism of platosamtnine and platosemidiammine de- 

 pends on the presence of two separated molecnles of ammonia in the first base and 

 one molecule of diammonia in the second, was afterwards subjected to a long and labo- 

 rious experimental criticism. I found that the two isomeric chlorides niay be nnited 

 with aniline, producing two isomeric componnds containing ammonia and aniline, viz: 



| N H 3 "N C, H, I ] N H 3 ~N H 3 [ 



Pt \ N h 3 -n c 6 h 7 ( Cl 2 and Pt \ N Ce Hf ~ N Cfi H? \ Cl 2 



The first, when heated with a solution of jodide of potassinm gives aniline and 

 the jodide Pt. j NH 3 } J 2 , while the second treated in the same manner gives 



O t J NH 3 \ T U 



1 l \ NC 6 H, | ,J 2 >• 



Several other facts, which I afterwards discovered, have confirmed my opinion regar- 

 ding the cause of the isomerism. 



The oeenrrence of two separate inolecules of ammonia in platosammine is an ini- 

 portant fact, which completely refutes the opinion propounded by Berzelius, and which 

 I had also adopted in some earlier papers on the ammoniacal-platinum-compounds, that 



those bases contain amido-ammonium N H 2 NH 4 . In the radiele Pt \ NH 3 it is im- 

 possible to assume the presence of amidogen NH 2 . 



In three smaller papers printed in the »Ofversigt af K. Vet.-Ak. Förh.» 1871 p. 

 175 I have given summary accounts of my latest researches on the bases of plati- 



') Odling Chem. News. Vol. 21 p. 289. 1870. 



'-) Kolbe Journ, f. Pr. Ch. N. F. 2 p. 217. 1870. 



:; ) Blomstrand Deutsch Chem. Ges. IV N:o 1 p. 40. 



') Clkvk »Om några platinabaser, hvilka innehålla organiska radikaler» Ofvers. af K. Vet.-Ak. Förh. 1870 p. 883. 



