III. Note of researches on the poly-ammonias.—No. III. Contributions towards the history of the diamides; cyanate and sulphocyanide of phenyl

About ten years ago, when engaged in the study of aniline, I discovered two beautiful crystalline compounds, carbanilide and sulphocarbanilide, which can be produced by a variety of processes. The former is best prepared by the action of phosgene-gas on aniline, while the latter is most readily and most abundantly procured by the action of bisulphide of carbon on aniline. The composition and the constitution of these bodies is indicated by the formulæ— carbanilide…...C26 H12 N2 O2 = (C2 O2 )'' (C12 H5 )2 H2 } N2 , Sulphocarbanilide…C26 H12 N2 S2 = (C2 S2 )'' (C12 H5 )2 H2 } N2 . They may be viewed as derived from two molecules of ammonia (diammonia) in which two equivalents of hydrogen are replaced by two molecules of phenyl, and two other equivalents by the biatomic molecules C2 O2 and C2 S2 .