ORGANIC BODIES CONTAINING METALS. 
421 
as is seen by the following comparison : — 
Calculated. 
A 
Found. 
A 
c, 
r 
. . 24 
25-05 
( ' 
I. 
25-09 
II. 
III. 
\^4 . 
• • 
H5. 
5-22 
5-18 
• • 
Sn . 
. 
. . 58-82 
61-39 
62-25 
6I-73 
0 . 
. . 8 
8-34 
100-00 
Analyses Nos. I. and IV. of iodide of stanethylium also clearly show the trans- 
formation of the iodide into the oxide of stanethylium by ammonia; in analysis No. I. 
1-6806 grm. of iodide of stanethylium gave -7263 grm. of oxide of stanethylium, and 
in analysis No. IV. 2-0980 grms. of the iodide yielded -9218 grm. of the oxide of stan- 
ethylium. Hence 
Calculated. Found. 
100 parts of iodide of stanethylium yield of 
oxide of stanethylium 
44-64 
I. II. 
43-22 43-93 
The numbers obtained by experiment correspond sufficiently well with the theore- 
tical one, when it is considered that oxide of stanethylium is not absolutely insoluble 
in excess of ammonia. 
Oxide of stanethylium presents the appearance of a somewhat cream-white amor- 
phous powder, closely resembling peroxide of tin, but less heavy than that oxide ; it 
has a peculiar though slight ethereal odour and a bitter taste ; it is insoluble in water, 
alcohol and ether, but readily dissolves in solutions of acids and of the fixed alkalies ; 
with acids it forms salts, which are, however, for the most part difficultly crystal- 
lizable ; those with strong acids exhibit an acid reaction. The nitrate deflagrates 
when heated to about ]20°C., and on the application of a higher heat becomes pure 
peroxide of tin. The salts of oxide of stanethylium behave with reagents so nearly 
like the salts of peroxide of tin, that the two are very difficult to distinguish from 
each other. 
Sulphide of Stanethylium. 
When sulphuretted hydrogen is passed through an acid solution of a salt of stan- 
ethylium, a cream-coloured precipitate falls, which is insoluble in dilute acids and 
ammonia, but soluble in concentrated hydrochloric acid, solutions of the fixed alkalies, 
and alkaline sulphides ; from its solutions in the fixed alkalies and alkaline sulphides, 
it is reprecipitated, unchanged, on the addition of an acid. I have made no analyses 
of this body, but there is no doubt that its formula is — 
C4 H5 Sn S, 
and that it is produced by the following reaction — 
C4 H- Sn 0-1-HS=C4 H5 Sn S-f HO. 
Sulphide of stanethylium presents the appearance of an amorphous cream-coloured 
