Chemical elements
    Physical Properties
    Chemical Properties
      Alkali Phosphides
      Alkaline Earth Phosphides
      Copper Silver and Gold Phosphides
      Zinc Group Phosphides
      Aluminium Phosphide
      Titanium Group Phosphides
      Tin Phosphides
      Lead Phosphides
      Arsenic Phosphides
      Antimony Phosphides
      Bismuth Phosphides
      Chromium Phosphides
      Molybdenum and Tungsten Phosphides
      Manganese Phosphides
      Iron Phosphides
      Cobalt Phosphides
      Phosphonium Chloride
      Phosphonium Bromide
      Phosphonium Iodide
      Hydrogen Phosphides
      Phosphorus Trifluoride
      Phosphorus Pentafluoride
      Phosphorus Trifluorodichloride
      Phosphorus Trifluorodibromide
      Fluophosphoric Acid
      Phosphorus Dichloride
      Phosphorus Trichloride
      Phosphorus Pentachloride
      Phosphorus Chlorobromides
      Phosphorus Chloroiodides
      Phosphorus Tribromide
      Phosphorus Pentabromide
      Phosphorus Diiodide
      Phosphorus Triiodide
      Phosphorus Oxytrifluoride
      Phosphorus Oxychloride
      Pyrophosphoryl Chloride
      Metaphosphoryl Chloride
      Phosphoryl Monochloride
      Phosphoryl Dichlorobromide
      Phosphoryl Chlorodibromide
      Phosphoryl Tribromide
      Metaphosphoryl Bromide
      Phosphoryl Oxyiodides
      Phosphorus Thiotrifluoride
      Phosphorus Thiotrichloride
      Phosphorus Thiotribromide
      Mixed Phosphorus Thiotrihalides
      Phosphorus Suboxides
      Phosphorus Trioxide
      Phosphorus Dioxide
      Phosphorus Pentoxide
      Hypophosphorous Acid
      Phosphorous Acid
      Meta- and Pyro-phosphorous Acids
      Hypophosphoric Acid
      Tetraphosphorus Trisulphide
      Diphosphorus Trisulphide
      Tetraphosphorus Heptasulphide
      Phosphorus Pentasulphide
      Phosphorus Oxysulphides
      Phosphorus Thiophosphites
      Phosphorus Thiophosphates
      Phosphorus Selenophosphates
      Phosphorus Sulphoselenides
      Diamidophosphorous Acid
      Phosphorus Triamide
      Monamidophosphoric Acid
      Diamidophosphoric Acid
      Triamidophosphoric Acid
      Dimetaphosphimic Acid ≡P=
      Trimetaphosphimic Acid
      Tetrametaphosphimic Acid
      Penta- and Hexametaphosphimic Acid
      Monamidodiphosphoric Acid
      Diamidodiphosphoric Acid
      Triamidodiphosphoric Acid
      Nitrilotrimetaphosphoric acid
      Monothioamidophosphoric Acids
      Thiophosphoryl Nitride
      Di- Tri-imido- and -amido-thiophosphates
      Imidotrithiophosphoric Acid =
      Phosphorus Chloronitrides
      Triphosphonitrilic Chloride
      Tetraphosphonitrilic Chloride
      Pentaphosphonitrilic Chloride
      Hexaphosphonitrilic Chloride
      Heptaphosphonitrilic Chloride
      Triphosphonitrilic Bromide
      Phosphorus Halonitrides
      Phosphorus Nitride
      Pyrophosphoric Acid
      Phosphoric acids
    Slow Oxidation
    Phosphatic Fertilisers

Di-, Tri-imido- and -amido-thiophosphates

A great variety of Di-, Tri-imido- and -amido-thiophosphates, chiefly in the form of their ammonium salts, was obtained by the action of ammonia, usually in the liquid form, on phosphorus pentasulphide. Some of the ammonia could be driven off by heating under reduced pressure, leaving the acid salts.

Gaseous ammonia at ordinary temperatures reacted with phosphorus pentasulphide giving a hexammoniate, P2S5.6NH3, and perhaps a heptammoniate, P2S5.7NH3. The former may rearrange itself so as to give tetrammonium diimidopentathiodiphosphate:—

The addition of another molecule of ammonia, either by means of liquid ammonia or by saturating with the gas, yields a substance having the empirical composition of the heptammoniate, which, however, may consist of equal mols of (a) diammonium nitrilodithiophosphate, NP(SNH4)2, and (b) triammonium imidotrithiophosphate, HN=P(SNH4)3. On treatment with liquid ammonia the nitrilo- compound dissolved and could be obtained by evaporating the solvent, while the imido-compound, being sparingly soluble, crystallised. The nitrilo-compound lost one or more molecules of ammonia when heated in a vacuum. When treated with KOH or NaOH it gave hydrated dipotassium or disodium compounds as oils, the latter of which could be made to crystallise. Characteristic insoluble salts were those of lead (yellow) and of barium (white). The imido-compound, HN=P(SNH4)3, was a white crystalline substance which deliquesced in moist air and gradually lost ammonia. It was insoluble in all ordinary solvents. It was hydrolysed slowly by water and smelt of H2S. It lost one molecule of NH3 when warmed to 50° C. in a vacuum. By heating at gradually increasing temperatures from 90° to 180° C. in an atmosphere of H2S it was transformed into the free acid.

© Copyright 2008-2012 by