84 V. T. CL B VE, 



analogy is striking, as by the action of triethylphosphine upon the tetrachloride of pla- 

 tinuni first the chloride of triethylphosphine P(C 2 H 5 ) 3 CL is formed and then proto- 

 chloride of platinum, which unites with triethylphosphine. Mr Blomstrand *) has 

 also explained the isomerismus by supposirig the yellow product first obtained to be 



rtj rl and tho white isomeric compound to be 1 t< p , c H yJ01 2 . f nis supposition 



strikes me as perfectly correet. Mr. Kolbe has explained the isomerismus in another 

 manner, i. e by suggesting that the vellow chloride is analogous to the green chloride 



of Magnus, for which compound he gives the formula Pt L H 3 Cl 2 , and the white chlo- 

 ride analogous to the chloride of Kelset (the chloride of platosammine), for which he 



gives the formula: 



ptj 



H, i\U* 



IL 



This theory however can scarcely be correet, seeing that the formula for the green 

 chloride of Magnus at least, cannot be written according to Kolbe's suggestion. 



Cahours and Gal have fuund, that the white chloride gives double chlorides with 

 the chlorides of gold and platinum: 



8A»CL+Pt{J£3*}CL and PtCl 4 + Pt{^}Cl ä 



Cahours and Gal have also obtained analogous chlorides, containing triethylarsine 

 and trimethylphospine. 



In the same manner as triethylphosphine is united with the protochloride of pla- 

 tinum, the trichloride of phosphorus, PCI.,, may also unite with the protochloride of 

 platinum. 



Mr Sciiutzenberger 2 ) obtained by the action of pentachloride of phosphorus 

 upon metallic platinum the chloride Pt.PCl 3 .Cl a , which corresponds with the chloride 



of platosemiammine Pt{ cl ' , as yet undiscovcred, and which may consequently be 



written Pt-L, 3 ' This remarkable compound can be united with one mol. PC1 3 , thus 

 producing either of the compounds 



p /PC1 3 .C1 p LPC] 3 ~PC1 3 C1 



1 ^PCIj.Cl 0l L T '|C1 



Which of tliese formulas may be the right one is at present impossible to decide. In 

 thesc compounds the PC1 3 retains its function, thus 3C1 may be exchanged for 3H0 

 or 3R0(R = silver, ethyle or methyle) Thus the following compounds are obtained: 



(Cl * j(l |C1 



Pt. p . 011; p t L 3Ag; Pt P . . CH 



1 l° H l I lo ^ I lo. an! 



u Cl , C) 



') Bericht der Deutsche chem. Gen. 1 871. Blomstrand. 



-) SciiixzENHERGER Bull. de la Soc. Cliim. de Paris 1870 Aug. p. 97. Sept. — Get. p. 178. The complete 



treatise 011 these interesting compounds has been hewly published in Bali. 80c. Chim. 187,?. 1. p. 482. 



and II. p. 101. 



