CS2 + 2NH3 -> NH2.CSS.NH4 -> H2S + NH4CNS.
Carbon bisulphide combines with primary amines to form alkyl
dithiocarbamates, which when heated lose sulphuretted hydrogen and
leave a residue of a dialkyl thio-urea,
Encyclopaedia Britannica, 11th Edition, "Capefigue" to "Carneades" Volume 5, Slice 3 · 第 66 / 74 题