72 



P. T. C LE VE, 



Platinum 

 Sulphur .. 



31,62 



20,33 



The corapound did not contain aniline and the analysis shows that it was the 

 sulphite 6NH 4 . 6 . (SO) + 0,Pt, described by Lang 1 ) which requires: 



Platinum 31,62 



Sulphur 20,45 



I was consequently unable to obtain any evidence of the composition of the chlo- 

 ride, but from the remark by Chydenius, that its solution is precipitated by nitrate 

 of silver, and its colonr white at the first moment, it does not seein likely to be a 

 chloroplatinite, but rather a chloride of a platino-anilinic base, and as the chloride is 

 formed in the same manner as the chloride of platosemidiammine it appears most pro- 

 bable that its formula is: 



pt |2C 6 H 7 N.Cl 



Chydenius has described several sulphites of a platino-anilinic base. By adding 

 aniline to a solution of sulphite of platinum he obtained the compound : 

 2(NH 8 C G ).0,. .(SO), . 2 .2(NH 7 C 6 ).Pt + H 2 0,in which formula I have supposed two at 

 H more than the formula of Chydenius contains. 



The corresponding salts of silver and barium are: 



A gi . (SO), . O* . 2(NH 7 C 6 )Pt + 2HX) 

 Ba.O, .(SO) ä .0 2 .2(NH 7 C 6 )Pt 



and 0<g*}0 8 (S0), . O a . 2(NH 7 C 6 )Rt 



All the aniline-compounds of platinum obtained by me contain only diatomic 

 platinum. Platino-anilinic bases with tetra-atomic platinum probably do not exist. 



The radicles of the compounds containing aniline and ammonia, which I have 

 analysed may be written in the following manner: 



I. Ptg 



2NH 3 

 2NH T C„ 



TT p t /NH 3 'NH T C t , 

 Ll ' r l lNH 3 ^NH ; C 6 



III. Pt{ 



2NH, 

 3NH T C R 



IV Ptf NH> 



1> • L 'lNH 7 C 6 , 



V. Pt{ 



NH 3 



NH- G' 



A. Compounds of the radicle Pt| 



2NH 3 

 2NH, C B 



R. 



1. Chloride, RCL, was obtained by heating the chloride of platosemidiammine in 

 a closed tu be with aniline and some aqueous alcohol. Besides some brown resinous 

 matter, a white crystalline powder was obtained. It was washed with cold alcohol and 

 dried över oil of vitriol. The chloride is easily soluble in water and löses a part of 

 its aniline without difficultv. 



Analysis: 

 a. 0,3940 gr. gave 0,1570 gr. metallic platinum. 



l ) Om några nya platina-oxidulföreningar, Upsala 1861 p. 28. 



