620 PROFESSOR FREDERICK GUTHRIE 
in sulphur and wholly volatile, with but trifling decomposition. But both 
analysis and the fact of the evolution of sulphide of hydrogen show that it con- 
tains less sulphur than belongs to the compound 
Cio H,, 8, 
Its boiling point rises from cizca 60° C. to 260° C. 
Nascent hydrogen proves, therefore, too powerful a dehalogenizer for the end 
in view. 
Metallic zinc enjoys the curious power of removing the whole of the chlorine 
and leaving the sulphur intact, according to the equation, 
C,, H,, 8, Cl+ Zn=C,, H,, 8,4 Zn Cl. 
10 ~2 
The necessity for only one equivalent of zinc in the above equation attaches the 
reaction rather to the reduction of kakodyl from its chloride by means of zinc 
(C, H,), As Cl+ Zn=Zn Cl+(C, H,), As, 
or the reduction of ethyl from its iodide by sodium 
C, H, 1+ Na=Na1+C, H,, 
than to the reaction obtaining between the iodide of ethyl and zinc. 
To prepare the bisulphide of amylen, an alcoholic solution of the bisulpho- 
chloride is treated with water, nearly sufficient to produce precipitation. Granu- 
lated zinc is added, and the retort containing the reagents is attached to an 
inverted condenser, and gently boiled in a water bath for some hours. 
To test whether the reaction is accomplished, a few drops of the solution are 
evaporated in a crucible until the alcohol is expelled. The residual liquid is 
then washed with water, redissolved in alcohol, and treated with a fragment of 
sodium. The whole is then gradually heated to redness, and the chlorine tested 
for in the ordinary way. The slightest trace of chlorine may be thus detected in 
all bodies soluble in alcohol. 
The whole of the chlorine being eliminated, the product is treated with water. 
and the oil which rises to the surface is removed. After repeated washings 
with water, it is dried over chloride of calcium and rectified. The portion which 
boils between 200° and 208° is collected apart. From this a large product is 
obtained, which boils constantly at 200° C. 
On analysis, 
I. 0:8012 grms. gave 30°60 per cent. of sulphur. 
II. 0:2833 grms. gave 58°32 per cent. carbon and 10°36 hydrogen. 
III. 0°3270 grms. gave 58:26 per cent. carbon and 10-24 hydrogen. 
107096 | IS «5s Found— 
requires, I. II. Lane Mean. 
C=58'82 maf 58°32 58-26 58:29 
H= 9°80 ae 10-26 10°24 10-25 
Sa lnad 30°60 San, a 30°60 


99:99 99-14 
