Vol. eae 3.] Action of Stannic Chloride. 135. 
After the decomposition of one molec 
: ule of phenylhydra- 
zine two molecules of hydrochloric acid are seed: ene 
C,H,H.N.NH, + SnCl, = C,H;.H + N, + 2HCl + SnCl, 
and if these two molcules of hyd ic aci i 
ydrochloric acid require two 
vem of free phenylhydrazine for their patuminlics the 
nal reaction would be represented by the equation— 
3C,H,H.N, + SnCl,=C,H, + N, + 2C,H;H;N,HCl + SnCl, 
but what really happens, as can be deduced from the data 
obtained, is represented by the equation— 
2C,H,H,N, + SnCl,=C,H, + N, + SnCl, + C,H,H;:N,, 2HCl. 
chloric acid ; consequently the formation of some double salt 
with the chlorides of tin was suspected. Thorough search was 
cadmium, cobalt, zinc, mang e, 
ao a by Moitessier (Centralblatt 1897, 2, 297), but none 
as ] i 
have been combined with two molecules of hydrochloric acid, 
and this conclusion is further supported by the existence of 
two salts of the base with hydrofluoric acid, — 
C,H,H,N;,HF and C,H;H,N,,2HF 
(Thieme, Annalen, 1893, 272, 209). The acid salt with hydro- 
chloric acid decomposes in aqueous solution, neutral salt and 
free acid being formed. 
have much pleasure in expressing 
cher P. C. Ray for the interest he has ta 
ions. 
my best thanks to 
ken in my investiga- 
CHEMICAL LABORATORY, 
Presidency College, Calcutta. 
