Tetraphosphonitrilic Chloride, P₄N₄Cl₈

Tetraphosphonitrilic Chloride, P₄N₄Cl₈, forms colourless prisms, density 2.18. The molar weight was determined by vapour density and depression of the freezing-point of benzene. Solubility relations are similar to those of the tripolymer. An octoanilide, {NP(NHC₆H₅₂}₄, has been prepared. Like the trinitrilic chloride it was scarcely affected by water alone, but an ether solution gave first an hydroxychloride and then tetrametaphosphimic acid, [NH(POOH)]₄.2H₂O.