13. Action of Stannic Chloride on Phenylhydrazine. 
By Jir—EnDRa Natu RaksHIT. 
The preparation of phenylhydrazine by the reduction of 
diazonium chloride with the simultaneous oxidation of stannous 
chloride to stannic chloride in aqueous solution (Meyer, Lecco, 
Ber, 1883, 16, 2976) is a proof that the reducing property of 
phenylhydrazine as salt is less than that of stannous chloride 
in solution. This investigation was undertaken with a view 
to ascertain whether the reaction is reversible under different 
conditions, with the base in the free state and stannic chloride 
Both phenylhydrazine and stannic chloride being liquids, 
no solvent is necessary to bring about the reaction; on the 
contrary, when they are brought into contact the reaction 
commences with such vigour and so much heat is evolved, that 
if any compound like diazonium chloride were formed it would 
not exist at that temperature; necessarily, the formation of 
such compounds can only be inferred by isolating their pro- 
ducts of decomposition. Diazonium chloride decomposes ac- 
cording to the equation :— 
C,H,N : NCl=C,H,Cl + Nz. 
ack to diazonium salt the 
Now if phenylhydrazine comes b ming that 
following equation will represent the reaction, assu 
stannic chloride becomes stannous chloride, giving off two 
atoms of chlorine,— 
C,H,HN.N H, + 2Cl,-—> C,H,N: NCl+3HCl 
te OFLC + Ns. 
Even if there be formed a compound analogous to C,H, 
N,Cl, Cu, Cl, (Erdmann, Annalen, 1893, 272, 144) that would 
not be likely to decompose, yielding chlorobenzene, at tha 
igh temperature :— 
C,H,;N Cl, SnCl, =C,H,Cl + N, + SnCl,. 
The fact that chlorobenzene is not a product of the reac- 
tion is however no proof that diazonium chloride is not an 
