Imidosulphonic acid

Sulphimide, or Trisulphimide, (S02NH)s.—This is formed together with ammonia and imidosulphonic acid when sulphamide is heated at 200° to 210° C. It is also formed in small quantity as the ammonium salt, together with sulphamide, when sulphuryl chloride is treated with ammonia in chloroform solution 4... 

Imidosulphonic Acid, NH(S03H)2, the amide of which has already been described (p. 242), may be obtained as the ammonium salt by mixing sulphuric anhydride vapour with excess of gaseous ammonia and fusing the condensed flocculent product in an atmosphere of ammonia ... 

Imidosulphonic acid is decomposed by dilute hydrochloric acid, forming amidosulphonie acid and sulphuric acid. 

Ammonia. Amidosulphonic add. Imidosulphonic acid. Nitrilosulphonic acid. 

W. Traube described the formation of what he called sulphimide, along with ammonia and imidosulphonic acid, when sulphamide is heated at 200°-210°. The solid product is treated with water, the soln. mixed with silver nitrate, and the precipitated silver sulphimide, purified by recrystallization, is decomposed with dil. hydrochloric acid. The aq. soln. decomposes when the attempt is made to isolate the solid, for when the soln. is evaporated below 40°, only ammonium hydrosulphate remains. A. Hantzsch and A. Holl found the soln. in ethyl acetate has properties in accord with the trimolecular formula sulphucyl trumide, or trisulphimide, (S02.NH)3—e.g. ebulliscopic determinations of the mol. wt. and the electrical conductivities of the aq. soln. of trisulphimide and its salts. They were able to isolate a crystalline solid by crystallization from ethyl alcohol which they considered to be trisulphimide itself. A. Hantzsch and B. C. Stuer, however, showed that the alleged compound is extremely unstable, and that the soln. obtained by W. Traube, and the solid obtained by A. Hantzsch and A. Holl, was really sulphuryl imidodiamide, only indications of the transient formation of trisulphimide in non-aqueous solvents were obtained. Trisulphimide acts as an acid, and a few salts have been reported. A. Hantzsch and B. C. Stuer consider that the compound has tautomeric forms—a true imide and an acid ... 

Nitrilotrisulphonic acid] Imidosulphonic acid Amidosulphonic acid Ammonium nitrilosulphonate Diammonium imidosulphonate Triammonium imidosulphonate Ammonium amidosulphonate... 

Amidosulphonie Acid, NH2.SOsH, may be obtained by the action of sulphur trioxide on dry ammonia.2 When an aqueous solution of hydroxylamine hydrochloride is saturated with sulphur dioxide and afterwards evaporated, amidosulphonie acid is obtained.3 Potassium imidosulphonate, NH(S03K)2, and potassium nitrilosulphonate, N(SOaK)a, are both decomposed by hot water with formation of potassium amido-sulphonate 4... 

If a mixture of a soln. of the trisodium salt with a slight excess over an eq. proportion of ammonium nitrate be evaporated, ammonia escapes, and the acid soln. is neutralized with ammonia from time to time water is also added if necessary to dissolve any crystals. During the cooling of the hot soln., crystals of sodium ammonium nitratoimidodisulphonate, NH(NH4S03)2.NaN03, are formed in small, flat, thick prisms, which are anhydrous, and stable in air. The salt cannot be washed with water, or recrystallized from water without hydrolysis. If too little ammonium nitrate is used the complex salt is contaminated with some disodium imidosulphonate. The constitution is represented with quinquevalent nitrogen ... 

Normal mercuric imidosulphonate has not been isolated. According to E. Berg-lund, and E. Divers and T. Haga, when barium mercury imidosulphonate is treated with dil. sulphuric acid, in just sufficient quantity to remove the barium, it forms barium sulphate, and mercury hydroimidosulphonate the latter begins to hydrolyze at once, and the soln. becomes turbid owing to the separation of mercuric hydroimidodioxysulphonate, HN(S0g)2Hg302, or... 

E. Berglund found that when potassium mercuric imidosulphonate is added to a soln. of merourous nitrate, some mercuric hydroimidoxysulphonate is deposited only after long standing. E. Divers and T. Haga said that some nitric acid must have been present, because precipitation is immediate when that acid is absent. The composition varies within the limits expressed by mercurosic imidoxysulphonate, 0 Hg"N(S0s)aHg a a.3Ha0, and the more complex mercurosic salt ... 

Y. A. Jacquelain, and E. Berglund used a lead imidosulphonate in order to prepare the acid. E. Divers and T. Haga could not prepare the normal salt trilead... 

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