492 Canadian Record of Science. 
The Thio-urea. 
Twenty grammes of Tolidin in alcohol were boiled with 
an equal weight of carbon bisulphide in a flask with reversed 
condenser for six hours. The result was the formation of a 
white crystalline powder, melting at 185° and insoluble in 
most media, but soluble in strong sulphuric acid, from which 
it was precipitated on dilution. Hydrogen sulphide was 
evolved during the reaction. The resulting compound had 
the formula: C,, H,, NV, CS, and the reaction which occurred 
may be represented thus: 
C, H, NH, C, H, NH 
| + CS,= | hes EES 
C, H, NH, C, H, NH 
The following are the analytical results :-— 
Theory. Found. 
i II. ITI. 
C = 70.86 per cent. (pit 71.06 5055 
H = 5.50 6.03 5.81 
N = 11.02 i 300% 3006 cece 
S = 12.01 2 5000 So0d 12.14 
All attempts to convert this into an iso-sulpho- evauie 
by the usual methods were ineffectual. 
Diacetyl Tolidin. 
Tolidin, when boiled for a few hours with 7-8 times its 
weight of glacial acetic acid, in a flask with reversed con- 
denser, readily forms the diacetyl tolidin. The same sub- 
stance is at once formed in the cold when acetic anhydride 
is added to a solution of the base. It is a white crystalline 
powder, melting above 320° and insoluble in the usual sol- 
vents. It is deposited, however, in snow white needles on 
cooling its solution in boiling nitro-benzol; when thus puri- 
fied and dried at 130° it yielded the following analytical 
data :— 
Calculated for C,, Hy, N, O, 
Theory. Found. 
i TL. III. 
C= Vi 220i 72.62 72.29 
A= 6.75 6.88 6.59 
N= 9.46 Sood booed 9.75 
) == 10.81 
