Imidotrithiophosphoric acid

A. Stock and co-workers found that when ammonium imidotrithiophosphate is heated in an atm. of hydrogen sulphide, imidotrithiophosphoric acid, HN P(SH)3, is formed NHP(SNH )8+3H2S=3NH4SH+NHP(SH)a. The reaction begins at about 90°, and is continued for 12 hrs. at 140°-145°, and completed in several days at 175°-180°. The acid is pale yellow, and it becomes darker when heated and paler when cooled. It sp. gr. is 1-78 at 16-5°. No solvent is known which does not at the same time decompose the acid. It is insoluble in carbon disulphide even at 200° and it is hydrolyzed by water HNP(SH)3-f-3H20... 

A. Stock and co-workers obtained impure diimidopentathiodiphosphoric acid, S P(SH)2 NH 2) by heating imidotrithiophosphoric acid for a long time at 210°. It is suggested that phosphoryl diimidosulphide, S PS(NH)2 2, is formed as an intermediate product of the decomposition at about 100°. They obtained ammonium diimidopentathiodiphosphate, S P(SNH4)2 (NH) 2, by the action of ammonia at ordinary temp, on phosphorus pentasulphide and also by adding... 

Ammonium dihydromonothiophosphate was prepared by the hydrolysis of imidotrithiophosphoric acid, thus... 

Imidotrithiophosphoric Acid, HN = P(SH)3, prepared as above, was a yellow liquid having a density of 1-78, and like its ammonium salt, was insoluble in all the solvents which were tried. It was dissociated only at a high temperature, but was j>artly hydrolysed by water, thus... 

Trlammoninm imidotrithio- Diammonium lmidotri- Ammonium imidotrithio- Imidotrithiophosphoric phosphate. thiophosphate. phosphate. acid. 

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