1908] Ammonia-Ethyl-Phospho-Platino-Chloride 
99 
Experiment C : This was a repetition of Experiment B except 
that the temperature of the benzene solution was kept constantly 
at 6°. The crystal separation took place twenty-four minutes 
from the time the oil bath reached 220° . Recrystallized from alco- 
hol the substance was labeled *'C”. 
The results of the analyses of the three preparations follow : 
Theoretical chlorine for 
lonizable chlorine 
Total 
i n Chlorine 
A 7.66 7.64 15.16 
B 7.74 7.66 15.17 
C 7.47 7.49 15.01 
Pt C (NH8)2 1 Cl. 
. P(OC2H 5 )bJ 
lonizable Total 
7.62 15.23 
From these results it is evident that we have succeeded in pre- 
paring only the normal salt 
01 
\ Pt (NH,). 
( P(OC,H s ) 3 
1 
Cl. 
And yet Rosenheim’s directions have been faithfully followed and 
his description of the absorption experiment coincides with our 
observations. It is therefore not considered profitable to further 
undertake the preparation of Rosenheim’s compound until more 
specific directions are given. Meanwhile, it is our intention to try 
to prepare the compound 
( Cl, 
< Pt nh 3 
( P(OC„H s ) 
} 
analogous to the aniline compound prepared by Rosenheim, and 
to gain further light upon the character of the reaction by which 
the addition of ammonia changes the non-ionizable compound 
K i 
( PCOC.H.),) 1 
