94 
JOUKNAE OF THE MlTCHELE SOCIETY 
[ November 
Pt(NH 3 ) 3 VCI. 
P(OC 2 H s ) 3 ) 
But Rosenheim found that silver nitrate precipitated at once both 
chlorine atoms, even at o°, and that the molecular conductivity 
at 25° was 
V 32 64 128 256 512 
At 155.9 160.8 160.4 160 162.3 
From these facts and from the composition of the double salt with 
chlorplatinic acid, he concluded that the formula may be 
1 Pt f 
( P(0C 2 H s ) 3 ) 
a, 
but since such a formula is not in accord with the coordination 
number of platinous platinum, and since the compound is derived 
from the double molecule 
Cl 2 
Pt 
P(OC 9 H 5 ) 
Rosenheim assigned to it the formula 
J 
1 
(NH,), 
Pt 
P(OC 9 H 5 ) 3 
Such a formula appeared to us to be a strained interpretation 
of Werner’s views. Furthermore, the molecular conductivity, as 
given by Rosenheim, is abnormal in every way. It seemed desir- 
able, therefore, to repeat the preparation of the substance and to 
study its properties further. Experience gained in the study of 
the molecular conductivity of complex ammonia compounds at o Ql 
l Werner and Herty, Z. phys. Chem. vol. 38, p.331. 
