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, CS 2 +2R NH 2 - R NH CSS NH 3 RCS(NHR)2+H2S; or if the aqueous solution of the dithiocarbamate be boiled with mercuric chloride or silver nitrate solution, a mustard oil (q.v.) is formed, R.NH CSS NH3R+HgC12-Hg(R NH CSS)2->2RNCS-}-HgS+H2S.
From the primary amines are derived the diazo compounds and azo compounds; closely related are the hydrazines (q.v.).
On reduction by sodium amalgam in glacial acetic acid solution they yield primary amines.
With nitrous acid, the primary amines yield alcohols, the secondary amines yield nitrosamines and the tertiary amines do not react: Rï¿½NH 2 +0NOH= Rï¿½OH+N2+H20; R2NH+ [[Onoh= R 2 Nï¿½No H]] 2 0.
With benzene sulphochloride in the presence of alkali, the primary amines yield compounds of the type C 6 H 5 S0 2 NHR, soluble in alkalies, whilst the secondary amines yield compounds of the type C 6 H 5 S0 2 NR 2, insoluble in alkalies (0.