of Edinburgh , Session 1880-81. 
201 
c 6 h 5 
H — N=C — S — H . 
C 6 H 
5 
H— N— C 
Hofmann, in his paper* describing the preparation of thiofor- 
manilid, assigns to it the former of these formulae, and this view of 
its constitution is borne out by its solubility in alkalies, and by its 
formation from isocyanide of phenyl by the addition of H 2 S.f 
c 6 H 5 c 6 h 5 
I + H— S — H = I 
H — N=C — S — H . 
The second view of its constitution is supported by its prepara- 
tion from formanilid and pentasulphide of phosphorus, formanilid 
being admitted to have the constitutional formula. 
c 6 h 5 
0 
H — 1ST — 
H. 
The third method for the preparation of thioformanilid, that 
from sulphuretted hydrogen and diphenylmethenyldiamine J 
c 6 H 5 m 
c 6 h 5 n 
CH also seems to support the latter view. 
The constitutional formula of this body may therefore be written 
either 
c 6 h 5 
H — 
H— N=C' 
‘S 
or 
c 6 h 5 
H — N — & 
H — N— C' 
;s 
c 6 h 5 
or 
c 6 h 5 
n=c: 
N=C 
I 
c 6 h 5 
H 
s 
H 
* Hofmann, “Ber. Dent. Chem. Ges. 1878, p. 338. 
t Hofmann, “ Ber. Deut. Chem. Ges.,” x. 1095. 
+ Bernthsen, “Ber. Deut. Chem. Ges.,” x. 1241. 
