ACTION OF PHOSPHIDE OF SODIUM ON HALOID ETHERS. 207 
iE, IV. 
ee _ 
Carbon, tela . ‘ , : 58°9 59-4 
Hydrogen, . : ‘ ‘ ; : 53 54 
4 —_— 
Chlorine, 12°4 Poy ase , ; —— — 
Platinum, ——— — —_—— 
The formula which HormMann~* gives for the chloroplatinate of the oxide of 
triethyl-phosphine is 3(Ft,PO), Et,PCl,, PtCl,; but this formula does not 
appear to be a very probable one. It seems to us to be more likely that 
the chloroplatinate is a compound of the phosphine oxide with hydrochloric 
acid and chloride of platinum, and we find that the numbers calculated for such 
a formula, viz., 4(Et,PO), 2HCl, PtCl,, agree as closely with those obtained by 
HorMann in the analysis of the chloroplatinate, as do those calculated from his 
formula, thus— 
Calculated for 
Obtained. 3(Et. oi (Et,PCl,),PtCl,. 4(Et,PO),2HCl, PtCl,. 
Carbon, 30°17 5 : 30°9 : ? 30°4 
Hydrogen, 6°75 F ; ; 6:4 ' , ; 63 
Platinum, 21:06 : : : 21°2 : ; : : 20°8 
Chlorine, 22°93 : . ’ 22:9 , F ; 22:5 
It will be seen that the only difference Peiven these two formule is that 
the one on the right hand contains an atom more oxygen and two atoms more 
hydrogen than the one on the left ; that is to say, a difference of 18 as regards 
molecular weight. As the latter amounts to 930 in Hormann’s formula, the differ- 
ence in the calculated percentage of each element is very slight, and this is still 
more the case with the chloroplatinate of the benzyl compound—the molecular 
weight of which with Hormann’s formula is 1674, and with our formula 1692. 
But, on the other hand, the proportion of carbon is so large that the percen- 
tage of that element is perceptibly different with the two formule, and it will 
be seen that this difference is decidedly in favour of the formula which we 
propose. 
We may add that it appears to us to be highly improbable that O should be 
replaced by Cl,, by simply mixing at ordinary temperatures chloride of plati- 
num and the phosphine oxide.t 
The results of our analysis, compared with the numbers calculated for the 
two formule are— 
Calculated for Calculated for 
eS ee eT LES 
Obtained. 3{ oR ets { eee te e PtCl,  4{(C,H,),PO}2HCLPtCl,. 
Carbon, 59:2 ; : ; 595 
Hydrogen, 5:3 é : : os ; : : : 50 
Platinum, —— : ; 2 lly, : : ; : . ai alorA 
Chlorine, 12°5 s : ; 12°7 : : ‘ , ; 12'5 
* Trans. Roy. Soc. Lond., 1860, p. 418. 
+ The experiments of Crarts and Srtva (Joc. ct.) show that this replacement does not occur. 
